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This paper has simulated the pump laser automatic signal control for erbium-doped fiber amplifier gain, noise figure, and output spectral power. Signal gain and noise figure are deeply studied in relation to laser pump power variations at operating pumping wavelengths of 980 nm and 1,480 nm for previous and proposed models. Similar to the study of the light signal to noise ratio, output power level and maximum Q factor are also simulated versus EDFA amplifier length at pumping power of 500 mW and different pumping wavelength by using the proposed model. The obtained results are better by using a pumping wavelength of 1,480 nm than a pumping wavelength of 980 nm. The optimum EDFA amplifier is 5 m, which gives better performance than other amplifier lengths. [ABSTRACT FROM AUTHOR]

The study has outlined the different correction codes based optical wireless communication channel and security management in free space optics communication systems. The used codes that are namely forward error correction (FEC) code, Reed Solomon (RS) code, and Redundancy check (RC) code. The output power, maximum Q-parameter coefficient and minimum data error rates are estimated with these codes with variations of input signal power and propagation distances. The performance of optical wireless channel is enhanced with FEC code in compared to other proposed codes under the same operating conditions. [ABSTRACT FROM AUTHOR]

The most powerful computer is in a very big need for a reliable random access memory (RAM) which can buffer digital data in. All optical RAM design is introduced in three phases. Those are the loading process phase which describes how data will be entering the closed trap from the line bus. The regeneration process phase which describes how data trapped are regenerated to not to lose its power or get a distortion. As well as the recalling process which describes how trapped data be handled to the line bus is also introduced. [ABSTRACT FROM AUTHOR]

Long-haul 16-channel dense-wavelength division multiplexing networks employing two different avalanche photodiode (APD) structures (Si and InGaAs) and positive-intrinsic-negative (PIN) photodetectors are simulated and compared under thermal noise effects for different fiber lengths. The effect of thermal noise level on the transmission quality with a variation of amplifying section length, number of amplifying sections and channel speed is discussed. The impact of thermal noise on the system performance is analyzed by varying input power from −5dBm to 20dBm for both 25 km and 50 km amplifying section at 100 km fiber length. The performance is evaluated for both 5 Gb/s and 10 Gb/s data rates over transmission distances up to 500 km. A comprehensive comparison is developed based on signal-to-noise ratio (SNR), quality factor (Q-factor) and bit error rate (BER). It is found that both APD structures achieve superior performance up to distance of 350 km comparing to PIN photodetectors for 50 km amplifying section. The system provides optimum performance at input power Pin = 10dBm in case of 50 km amplifying section, but then afterwards, the performance is degraded rapidly due to nonlinearities. The results revealed that the worst performance scenario is at 10–18 W/Hz thermal noise in terms of higher BER and lower Q-factor. Finally, the desirable BER of 10–12 is achieved at Q-factor of 6.78 and SNR of 23 dB. [ABSTRACT FROM AUTHOR]

There is an increase in the number of chronic and heart diseases due to work culture etc. The current hospital-centric system is becoming inefficient to treat patients that demand immediate attention and this can efficiently be implemented by using the Internet of Things (IoT) technology. The aim of this paper is to implement IoT-based health monitoring system which measures temperature, blood pressure, and heartbeat of a patient located remotely and send the data to the doctor for analyzing the condition of the patient. And also an optical light sensor is used to check the light condition in the patient room and based on the sensor value the light will be controlled (ON/OFF). The system is implemented using a BeagleBone Black (BBB) development board. This model saves the work time of the doctors to check the patient's condition. By using the Global System for Mobile communication (GSM), the patient's data is sent to the cloud through which the doctor can monitor the parameters anywhere in the world using the mobile application or web page. [ABSTRACT FROM AUTHOR]

Copper nanoparticles (Cu) anchored lithium niobate (LiNbO3) nanostructures were prepared by a simple hydrothermal technique. The fine and sparse Cu nanoparticles were homogeneously dispersed over the surface of LiNbO3. An effectual anchoring of Cu was evidenced from the acquired reflection planes in diffraction analysis, which clearly indicate the face-centered cubic structure of Cu. The UV-Visible spectrum of LiNbO3 and Cu/LiNbO3 nanocomposites were also studied. When the Cu nanoparticles were doped with LiNbO3/LiTaO3 superlattice system, the change in the dispersion relation was observed theoretically. The characteristics of the polariton dispersion variation with filling factor of Cu nanoparticles concentration were investigated systematically. The importance of the polariton modes in communication sector was analyzed and the occurrence of new modes on the polaritonic gap, where the propagation of the electromagnetic wave is forbidden, were obtained in the system due to the presence of copper nanoparticles. [ABSTRACT FROM AUTHOR]

This study has presented spatial continuous wave laser and spatiotemporal vertical cavity surface emitting laser (VCSEL) for high speed long haul optical wireless communication channels. Possible data rates range from 40 Gb/s to 250 Gb/s over propagation distance ranges from 500 km to 2500 km. The optical wireless communication (OWC) system performance is tested through the measurement of maximum Q-factor, minimum bit error rate (BER) and signal to noise ratio (SNR). It is observed that spatiotemporal VCSEL has presented better performance than CW laser in the OWC system, especially for long haul transmission applications. It is observed that SNR improvement ratio ranges from 8.15 % to 19 % by using spatiotemporal VCSEL than CW laser for bit rate of 40 Gb/s over propagation distance ranges from 500 km to 2500 km. Max. Q-factor improvement ratio ranges from 4.62 % to 13.71 % by using spatiotemporal VCSEL than CW laser for data rate of 40 Gb/s over propagation distance ranges from 500 km to 2500 km. So it is clear that spatiotemporal VCSEL is more suitable for long haul OWC applications than other optical sources. [ABSTRACT FROM AUTHOR]

Terahertz (THz) sources have attracted special attention for various applications. Compared to the standard silica-based optical fibers, silicon waveguides have more advantages such as higher refractive index and lower absorption loss over the THz region. In this paper, for the first time, a rib silicon waveguide based on the photonic crystal (PC) idea is designed and by using the scalar modulation instability (SMI) phenomenon, tunable wavelength conversion for THz wave generation is simulated. By changing the structural parameters such as the air-hole diameter of the PC and infiltration of optical fluids into the air holes, linear and nonlinear characteristics of the waveguide are controlled and hence the generated THz radiation is considered as a tunable source. Simulation presents that the maximum converted wavelength, 326.17 μm, is obtained when the air-hole diameter is set at d = 0.86 μm and the pump wavelength is in the normal dispersion regime. Also, we have infiltrated optical fluids into PC air holes in order to change the dispersion properties of the waveguide while keeping the geometrical parameters unchanged. This led to converted wavelengths of 70.5, 76.8 and 107.5 μm, all located in the THz region. The loss of this waveguide is less than 0.8 dB cm , which is less than that of previously reported in similar silicon waveguides. [ABSTRACT FROM AUTHOR]

High-speed single-mode fiber-optic communication systems have been presented based on various hybrid multiplexing schemes. Refractive index step and silica-doped germanium percentage parameters are also preserved during their technological boundaries of attention. It is noticed that the connect design parameters suffer more nonlinearity with the number of connects. Two different propagation techniques have been used to investigate the transmitted data rates as a criterion to enhance system performance. The first technique is soliton propagation, where the control parameters lead to equilibrium between the pulse spreading due to dispersion and the pulse shrinking because of nonlinearity. The second technique is the MTDM technique where the parameters are adjusted to lead to minimum dispersion. Two cases are investigated: no dispersion cancellation and dispersion cancellation. The investigations are conducted over an enormous range of the set of control parameters. Thermal effects are considered through three basic quantities, namely the transmission data rates, the dispersion characteristics, and the spectral losses. [ABSTRACT FROM AUTHOR]

Routing is fundamental in any wireless network for path selection, which provides the most effective way that legitimizes the data to be transmitted from a source to a destination device. In gigantic network demand nowadays, routing is pertinent to ensure fast and reliable data transfer. Ineffective routing may cause route flapping and degrade the overall Quality of Service (QoS). Meanwhile, Device-to-Device communications (D2D) is a technology that allows the devices to be connected without or partial involvement of the conventional cellular network. With these natures of qualities, D2D communication provides a reliable propitious medium that caters for the needs of many different telecommunications scenarios. The interconnectivity of multiple devices creates the Internet of Things (IoT), which will be an essential insistent in future technologies. With the dynamic nature of D2D technology, the routing approach act as a principal architecture that essential to be implemented in every niche D2D aspect. If wrong routing decisions are made in D2D communication, the QoS performance would be worse than the conventional cellular network. This paper present the state of the art of fundamentals, recent progress, current challenges, future directions, and potential routing applications for D2D and Beyond IoT 5G Networks. This review will also act as a guide and reference for future researchers and scientists to explore and integrate the routing technique in D2D communication and Beyond IoT 5G Networks. [ABSTRACT FROM AUTHOR]

The Frequency Shift Keying (FSK) dual-transmission mode for short-range communication using the silicon microring resonator arrangement is proposed. FSK generated by an optical modified add-drop multiplexer embedded gold grating connected to three other microring resonators. The proposed system consists of a transmitted microring with two nano-ring phase modulators, which connected through a 10 km fiber channel to a receiver. The user end consists of three similar microring systems. A gold grating embedded on two side ring center (sensor probe) to introduce the plasmonic polariton, from which each of sensor probe identified by the Bragg wavelength. The frequency of n photonic oscillator is in the range of plasmonic frequencies, where the Whispering Gallery Mode (WGM) due to the light propagations can be obtained by controlling the used two sides smaller ring resonator in the proposed ring structures. The WGM beam can be used as another mode of transmission called light fidelity (LiFi) transmission. In manipulation, the FSK light source wavelength of 1.55 μm fed into the system. The transmission bit rates of 200 Tbits−1is achieved. The Bit Error Rate (BER) obtained at the user ends increases with increasing input power. Each sensor node identified the Bragg wavelength, while the change in Bragg wavelength on each sensor obtained and shown the linear trend, which is useful for sensing application. In applications, the proposed system is capable of dual mode of transmission either cable or wireless and in this case, the cable transmission of data using LiFi is more reliable than WiFi in terms of security, efficiency, availability, and safety. [ABSTRACT FROM AUTHOR]

The present investigation deals with the synthesis of newly designed glucamine-functionalized magnetic graphene oxide (MGO-GLu) nanocomposite for the magnetic solid-phase extraction of inorganic arsenic (III) from water and its determination by inductively coupled plasma mass spectrometry (ICP-MS). The synthesized nanocomposite was comprehensively characterized using scanning electron microscopy (SEM), Fourier transform Infrared (FTIR) and EDX. The extraction of arsenic was optimized by analyzing various parameters, and recovery efficiency of MGO-GLu was found to be maximum at 2 mL HNO3 (0.1 M) as desorption solvent, 20 mg sorbent, 40 mL sample volume, 5 min contact time, 2 min desorption time and pH 5. Subsequently, the proposed method was validated under the optimal conditions for its figures of merit comprising limits of detection (LOD), quantification (LOQ), precision and reproducibility that were estimated to be 0.05 ng mL−1, 0.18 ng mL−1, 3.23 and 6.7% (%RSD at 10 ng mL−1, for n = 3 and n = 12 intra- and inter-day), respectively. Finally, the proposed method was applied to real water samples obtained from different sources (river, tap and industrial wastewater) displaying a high recovery range of 83–104%. Thus, the designed nanocomposite sorbent offers ease of applicability, rapid analysis, ease of isolation and efficiency for the trace determination of inorganic arsenic in water environmental samples. [ABSTRACT FROM AUTHOR]

The biased plasmonic circuit is proposed using a Panda-ring infinitesimal space–time function control. The circuit has two small rings alongside the main microring. The small rings act as phase modulators inducing the nonlinearity effect in the circuit. The gold grating at the center microring induces plasmonic polaritons resulting in plasmonic wave oscillations and the Bragg wavelength (plasma frequency). By using the suitable parameters, the whispering gallery mode (WGM) is formed at the center ring, where the small change of light optical path difference is compensated and resonant. The coupling side ring radii R L - R R → 0 is generated, where the unified space–time function is obtained. The saturation uncertainty space–time function known as a singularity is formed, which can be applied for fully biased plasmonic circuit characteristics. The circuit is fed by the input light with 1.50 µm center wavelength, where the input power varied from 1 to 10 mW. The bright soliton with a wavelength of 1.50 µm can move both back and forward (biased) on the time axis by the three different modulated Gaussian pulses of 0.60 µm, 1.10 µm, and 1.30 µm, where the full biased of the 1st space to the 2nd various spaces in terms of wavelengths is achieved. [ABSTRACT FROM AUTHOR]

The microring circuit is designed to form the upstream and downstream quantum communications. There are one space and two-time functions applied to form the transmission. A circuit consists of 3 microring resonators, where there are three processes of each transmission. Firstly, the space function pulse (soliton) fed into the system via the main ring input port. The whispering gallery mode (WGM) is generated at the center ring with suitable parameters. The dipole oscillation is formed by the coupling between plasmonic wave and gold grating, which will change in the dipole oscillation frequency inducing the change in the plasmonic sensor. The flip-flop signals obtained from the bright and dark soliton via the throughput and drop ports can apply for the transmission clock signals. Secondly, the quantum codes formed by a time-energy function input into the system via a silicon ring, which induced the four-wave mixing induced by the coherent light in a GaAsInP ring, can be identified and the quantum bits(qubits) formed by the polarized signal orientation. The quantum information is multiplexed into the system. Thirdly, the carrier time function will input via the add port main ring. By using the resonant condition, the multiplexed signals of those processes will transmit via either WGM or throughput port for wireless or cable transmission, respectively. The downstream process is processed the same way as the upstream, where the multiplexer is placed by the de-multiplexer. By varying the input power, the manipulation result has shown the potential realistic application for quantum and telepathic communications. [ABSTRACT FROM AUTHOR]

This present work is an extensive effort to report the key role of indispensable technical challenges in the sensing performance of an embedded nanogap SiGe source dielectric-modulated tunnel field effect transistor (SGS-DM-TFET) biosensor during the conjugation of biological samples for the first time. In order to reach high and brilliant insights into the different design considerations impacting on the sensing performance of the biosensor under the study, two key issues in terms of process-related issue and real-time-related issues covering biomolecules manners in the nanogap cavity of the biosensor have been comprehensively studied through extensive numerical simulation. Investigations in this work revealed that the SGS-DM-TFET biosensor must be truly configured for working in realistic conditions. The obtained results give us a useful guideline for sensing the biomolecules samples in the real conditions including low coverage percentage of biological samples, charge effect, and discrete probe position with the help of SGS-DM-TFET biosensor while keeping the high sensitivity. [ABSTRACT FROM AUTHOR]

It is well-known that near-infrared (NIR) light sources are appropriate to ablate benign tumor irreversibly using heat treatment even in deep tissues. The laser light penetration into the skin in these wavelengths is deep (3–5 mm). Applying new stable materials for emitting NIR wavelengths in tumor positions can help cancer treatment. In this paper, synthesis of the conjugated core-multishell Ag/SiO2/Ag and Au/SiO2/Au quantum dots (QDs) with indocyanine green (ICG) is done and their theoretical and experimental absorptions and emissions in the NIR region are investigated. Thus, heat generation (high-resolution medical imaging capabilities) and emission enhancement are explained and described based on the FRET model for the proposed core-multishell QDs and it is shown that Ag/SiO2/Ag with ICG presents 4 times higher emission rate versus ICG alone in NIR region. Also, because of the plasmon hybridization and also resonance light penetration enhancement, the temperature in tissues increases that is useful for photothermal therapy and NIR high-resolution medical imaging for deep tissues. As an alternative application, these nanoparticles with amazing features are used as a heat source in cancer treatment for shallow and deep tissues. Finally, it is shown that Ag/SiO2/Ag QDs are the best solution for this purpose. [ABSTRACT FROM AUTHOR]

This paper proposes a new silicon on nothing lateral double-diffused metal-oxide-semiconductor with two air gaps in the gate insulator (SON-APG LDMOS). Utilizing air for the buried layer and placing two air pillars in gate oxide has improved DC and AC characteristics of the transistor. 2-D simulation results of ATLAS simulator illustrate a 50% enhancement in the breakdown voltage compared to a conventional SOI-LDMOS (C-LDMOS). Besides, the on-state resistance reduces 60% as a result of drain current augmentation in the SON-APG LDMOS. Moreover, the RF feature of the SON-APG LDMOS improves due to the enhancement in the gate capacitances of the transistor. Therefore, the cut-off (fT), as well as maximum oscillation frequency (fMax), grows. The extra noise that the device adds to the signal reaching the load (Noise Figure) has improved in the proposed structure. [ABSTRACT FROM AUTHOR]

This paper presents the use of space and time function applied simultaneously into the silicon microring system arrangement for double vision problem solving and enhancement. The eye structure formed by three silicon ring resonators, in which the 3D imaging constructed and modulated by the space function and time function rings, respectively. The double vision problem manipulated by the interference of the whispering gallery modes generated by the system, the final image information connected the central nerve cells. The 3D imaging constructed by the space function formed by the whispering gallery modes (WGMs) named as object and reference beams. The image information modulated by the WGM of time function signals from the small ring (3rd eye). By using the suitable parameters, the WGMs of light beams within a system generated, from which the coupling of an object and reference beams used for imaging perception. The control part is the WGM beam generated by the time function that inputs into the small ring. The simulation results obtained have shown that the double vision control and adjust by the space-time function achieved, in which the vision wavelength and frequency can be expanded from 0.40–1.80 μm and 150–700 THz, respectively, which has the potential for artificial eye application. [ABSTRACT FROM AUTHOR]

In this work, a novel protocol is proposed for bidirectional controlled quantum teleportation (BCQT) in which a quantum channel is used with the eight-qubit entangled state. Using the protocol, two users can teleport an arbitrary entangled state and a pure two-qubit state (QBS) to each other simultaneously under the permission of a third party in the role of controller. This protocol is based on the controlled-not operation, appropriate single-qubit (SIQ) UOs, and SIQ measurements in the Z and X-basis. Also, in this paper, a new criterion of merit named as (predictability of the controller's qubit (QB) by the eavesdropper) is introduced, and the protocol is improved based on it. Then, the proposed protocol is investigated in two typical noisy channels, the amplitude-damping noise (ADN) and the phase-damping noise (PDN). The analysis of the protocol in the noisy environment shows that it only depends on the amplitude of the initial state and the decoherence noisy rate (DR). [ABSTRACT FROM AUTHOR]

In this paper, physical layer impairment (PLI)-aware shared path protection (SPP) scheme for single-link failures in transparent optical WDM mesh networks is considered. We propose PLI-aware integer linear programming (ILP) and heuristic algorithm for both SPP and dedicated-path protection (DPP) schemes. The objectives are to maximize the network resource utilization and minimize the quality of transmission (QoT) blocking probability, restoration time, and computational time. Both the ILP and the heuristic algorithm are evaluated, and their performance is compared. The heuristic algorithm is evaluated with extensive simulations over different network topologies. The solution obtained from the PLI-unaware SPP and DPP serves as the base line to evaluate the performance of our heuristic algorithm. The simulation result shows that the proposed algorithm is efficient and improves the QoT-blocking probability significantly. It achieves 100 % restorability and improves the network utilization up to 73 % . The result also shows an improvement in computational time. [ABSTRACT FROM AUTHOR]

We propose the use of the specific form of the integrated device known as the boxcar filters for big data transmission, where the advantage of such device is the number of roll-off (bandwidth) can be increased to meet the large demand of the future bandwidth requirements. A boxcar filter system is formed by the serial Panda-ring resonators, where the initial and end rings are used to form the whispering gallery mode beams for the light fidelity (LiFi) up-down-link conversion. There are 5 boxcar circuits within the system. Each of boxcar devices has the electro-optic connection that can be used to perform the external signal processing applications, where all electronic signals are changed to be the light signals and connected to the network via the free-space up-down link nodes. In a simulation, the selected light source is fed into the boxcar filters via the input port, in which the single roll-off bandwidth of 300 THz is obtained. The frequency guard band is given by each boxcar separation. In applications, the electromagnetic immunity interference (EMI) signals can be obtained by the electro-optic conversion circuit, which is the medical instrument specification requirement. The low EMI signals can be connected to the network and transmission using the LiFi network to the remote area. In addition, the medical information to home using the big data via the ad hoc LiFi network and the internet of thing platform arrangements are also proposed. [ABSTRACT FROM AUTHOR]

Spin wave generation formed by a soliton pulse within MZI embedded plasmonic antennas has been proposed. A soliton is the orthogonal (entangled) source that can be configured as the vertical and horizontal components in the same way as the polarization components. A dark soliton of wavelength 1.55 µm is selected and fed into the MZI input. The dark-bright soliton pulse entered into the upper and lower branches to form uplink and downlink antennas. The whispering gallery mode (WGM) can be generated by controlling the two side ring phase modulators. The gold grating surface is excited by the WGM input form the circuit, from which the electric dipoles oscillated. The trapped electrons by soliton pulses transmitted. The dipole oscillation of the antennas identified by plasma frequencies (Bragg wavelengths), which can form the spin-waves. The simulation programs are Optiwave and Matlab programs, from which the used parameters are selected from the realistic device parameters. The simulation results obtained show that the transmission bandwidth of 600 GHz with the antenna directivity of 7.78, and 4.63 for the uplink and downlink respectively and antenna gain (power) of 1.13 dB, and 1.07 dB for the uplink and downlink respectively. The transmission signals and power stability are confirmed by the transmission entanglement. The quantum sensor networks can also be applied, where the trend of the sensor sensitivity linearity is achieved. [ABSTRACT FROM AUTHOR]

We propose the use of the electron cloud generated by quasi-particle waves called polariton dipoles, which oscillated within a silicon microring-embedded gold grating system for quantum consciousness processing model. An embedded gold grating is coupled by a whispering gallery mode beam generated by a soliton pulse, from which the polariton waves oscillated with the plasma frequency at the Bragg wavelength. The excited polariton cloud by the external stimuli can be detected at the system output ports. The two states of the polariton (electron) are spin-up and spin-down that can process automatically and deliver to the network and cloud. In manipulation, the results obtained show the electron density increased by increasing the input power into the system. In application, the cell polariton cloud coupled by the external stimuli and patterned by the quantum cellular automata results, which localized in the cloud network and connected to the nerve cell access nodes. The coded polaritons connected to the nerve cell memory clouds, while the required commands are delivered to resonant cells via the network link. More stenographic codes can also be generated by other external stimuli sources, which can process similarly. [ABSTRACT FROM AUTHOR]

This paper reports nonlinear optical response studies of thin layers using graphene oxide (GO) and their performance for detecting water content in transformer oil using three sets of approaches. The sensor performance is evaluated based on bare optical fibre, D-shape optical fibre integrated with GO and the effects of the covering device with polydimethylsiloxane (PDMS). The improvement of this study is to ensure the stability of the recorded signal. The nonlinear optical response of the prepared dispersion was explored using the Z-scan technique with an 800 nm continuous wave laser beam. Taking advantage of the graphene-induced evanescent field using D-shape optical fibre with PDMS covers on the device can give high sensitivity and good stability for water dissolved in the oil at 1550 nm. We measured fluctuations in transmitted light associated with varying water contents ranging from 16 to 38 ppm. [ABSTRACT FROM AUTHOR]

An optical sensor composed of a circular cylindrical fiber surrounded by graphene layer is investigated. The thin layer of graphene is located at the core–cladding interface. The cladding is an aqueous material. The conductivity (σ ) of the graphene layer is taken as σ = σ ′ + j σ ″ , where σ ′ and σ ″ is the real and imaginary parts of the conductivity. We consider TE waves to propagate in the structure. Using Maxwell's equations, the dispersion relation is derived. Also, the sensitivity of the effective refractive index to any changes in the aqueous cladding refractive index is deduced. It is found that the sensitivity of the proposed optical fiber can be dramatically improved with the variation of graphene layer conductivity. [ABSTRACT FROM AUTHOR]

In this paper, a bandpass terahertz filter based on multilayer metamaterials is proposed, designed and simulated numerically. To do this idea, first of all, the functional behavior (filtering property) of the bilayer metasurface is investigated considering a single bilayer-cylinder as a unit cell in the periodic system. Then, we show that by increasing the number of cylinders as basic elements in the unit cell, the bandwidth will increase. Also, the center frequency is tunable through changes in the dimension of the basic element. The main advantages of the proposed structure that can be used to realize terahertz filters are wideband, tunable, and easy to build. It is shown that the bandwidth of the proposed bandpass filter is about 1 THz and the amount of transmittance is close to 93%. [ABSTRACT FROM AUTHOR]

An investigation of the plasmonic micro-antenna characteristics using an optical modified add–drop multiplexer embedded gold grating is proposed. A device consisting of a main microring and two nano-ring phase modulators is known as a Panda-ring resonator. A gold grating is embedded at the main ring center to induce plasmonic polariton, which is the plasmonic wave that oscillates with plasma frequency. At the resonance, the whispering gallery mode (WGM) of propagation light fields can be obtained by controlling the two suitable side ring parameters, from which the plasma resonant frequency is obtained by the graphical method called the Optiwave program. In manipulation, the light source with the wavelength of 1.55 μm is fed into the system. The input power was varied from 1 to 10 mW, from which the Bragg wavelength at the resonant peak is employed for all calculations. The directivity and gain of the plasmonic micro-antenna of 2.8 mW (4.47 dBm) and 0.78 mW (− 1.08 dBm) are obtained. The motivation for this study is that the plasmonic micro-antenna enhances the performance of optical/communication devices due to its extraordinary properties. The key finding is the operation of the plasmonic micro-antenna at optical frequencies using the Panda-ring circuit, which has dual modes for wireless and cable connections. In applications, the large-area antenna (multi-antennas) has the potential for atom, cell, and brain communication network investigations; regarding the linear relationship trend of the output gain, the use of the circuit for application in sensors is also possible. [ABSTRACT FROM AUTHOR]

Colloidal nanoparticles (NPs) interact with biological fluids such as human plasma to form a protein coating (corona) on the surface of NPs (NP-protein complex). However, the impact of size and type of NPs on binding of the hard corona to the surface of NPs as well as damping of their optical spectra has not been systematically explored. To elucidate the interaction between biological environment (human plasma) and NPs, a photophysical measurement was conducted to quantify the interaction of two different types of NPs (gold (Au) and silver (Ag)) with common human plasma proteins. The colloidal AuNPs and AgNPs were electrostatically stabilized and varied in diameter from 10 to 80 nm in the presence of common human plasma. The sizes of the NPs were determined using transmission electron microscopy (TEM). Optical absorption spectra were obtained for the complexes. Dynamic light scattering (DLS) measurement and zeta potential were used to characterize the sizes, hydrodynamic diameters, and surface charges of the protein-NPs complexes. Protein separation was performed using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) to isolate and identify the protein bands. The absorption of proteins to the NPs was found to be strongly dependent on the size and type of NPs. The distance between surface of NPs by absorbed protein bound to the NPs gradually increased with size of NPs, particularly for AgNPs with primary diameter of < 50 nm. The chi-square test proved that AgNPs are a good candidate in sensing the protein complex in human plasma compared with AuNPs mainly for the AgNPs with diameter sized 50 nm. [ABSTRACT FROM AUTHOR]

A novel approach is presented in order to study the effects of carrier generation on the drain-source current of graphene nanoscroll field effect transistors (GNSFET). In this method, ionisation carrier concentration is calculated and included in the drain-source current. In addition, a simulation approach based on Monte Carlo is employed in order to calculate ionisation coefficient. Finally, the current is calculated including ionisation and not including ionisation and compared together at different conditions in order to investigate the effect of ionisation. The results show that this mechanism is not ignorable in graphene-based transistors as it was in most cases in silicon transistors. In addition, the breakdown voltage has been calculated analytically and compared with fabrication results of couterparts in silicon technology. [ABSTRACT FROM AUTHOR]

In this study, a junctionless double-gate metal-oxide semiconductor field-effect transistor (MOSFET) is investigated by using the concept of charge plasma. The n+ charge plasma in source and drain regions is created electrically in the double-gate MOSFET (CPSD-MOSFET) using additional appropriate metals without applying doping. The results showed that the structure is like a conventional MOSFET, which can improve some electrical parameters. It protects the proposed structure from some limitations such as random doping oscillations and short-channel effects bearing its conventional structure. In addition, high temperature and annealing processes are unnecessary for making the source/drain doping of the CPSD-MOSFET because their regions are created electrically. Thus, the thermal budget step is removed. Furthermore, the proposed structure has some improvements as compared to the junctionless transistor structure, and it can overcome the main problem of this structure, namely the high off current. In general, in the proposed structure, the charge plasma idea changes the charges and depletion regions besides the channel and improves the short-channel effects such as hot electron effect and leakage current because of the improved electric field. [ABSTRACT FROM AUTHOR]

This paper proposes a novel model to attain high birefringence and low loss in a slotted core-based photonic crystal fiber (PCF) structure in THz regime. The performance of the proposed PCF has been evaluated by applying finite element method (FEM) with full simulation software COMSOL Multiphysics V-5.1. The proposed model gains good optical properties such as high birefringence of 0.24, low effective material loss (EML) of 0.03 cm − 1 , low confinement loss of 6.5 × 10 − 1 3  (dB/m), low scattering loss of 2 × 10 − 3  (dB/m) and low bending loss of 7.4 × 10 − 2 0  (dB/cm). The proposed structure also exhibits the flattened dispersion for wider frequency response. However, the real-life fabrication of the suggested model is highly feasible using the current technology due to the unique shape of circular air holes in the cladding region. The outcomes make the proposed PCF a stronger candidate for polarization-preserving applications such as sensing, communications and filtering operations in THz band. [ABSTRACT FROM AUTHOR]

The grating coupling surface plasmon polariton (SPP) waveguide is designed for nanoparticle sensors applications, where the properties of SPP waveguide model such as grating length and grating space length are designed with the Matlab and Optiwave programs. The propagation vector β of SPP grating slot waveguide is evaluated, from which the sensor applications model are simulated by the finite difference time domain method. The effective permittivity of the nanoparticle solution is evaluated. The sensor models are selected and the effective permittivity of the nanoparticle solution and used in the simulation model. The sensor activity of waveguides is determined with various values of the permittivity of grating space. The simulation result shows that the surface plasmonic TM0 mode of the design model is depended on a resonance with input wavelength, period length, space length, number of the grating, the permittivity of grating space, and the nanoparticle concentration in grating space area. It shows that the cut off wavelength is shipped by the refractive index of grating space, while the result of simulation at some low IR wavelengths shows linear relative between Hy field intensity of TM0 mode and grating space refractive index. The graph between Hy field intensity and concentration of nanoparticle solution also shows a good linear function, which has the good potential for sensor applications. [ABSTRACT FROM AUTHOR]

To meet the 5G requirements for higher bandwidth, the focus has been shifted to millimeter waves paving the way to radio over fiber (RoF) in order to minimize radio losses. Dual wavelength transmission within RoF for electromagnetic immunity interference (EMI) can be utilized within local area network and long-haul transmission. Health care services will also be able to utilize the technology to transmit health-related data from thousands of patients to the specific destination by connecting to the long-haul fiber optic cable connection. To make dual-wavelength transmission stable and reliable, the formation of the two-wavelength light source is proposed in this paper by means of the double coupled micro-ring resonators. The proposed RoF system will be able to transmit EMI signals of patients over 300 km of optical fiber link and 3 m wireless link without the need for any intermediate signal amplifying device. All the patient's data will be available to any doctor in any hospital securely by integrating with currently available wireless and the internet of things systems. [ABSTRACT FROM AUTHOR]

This study is performed to investigate the temperature sensitivity of SU-8-based triple-arm Mach-Zehnder interferometer (MZI) and straight waveguide. The proposed SU-8 2000-based rib waveguides are fabricated on a silicon wafer with 1.5-μm SiO2 thermal oxide layer. SU-8 layer of desired thickness is spin-coated onto the silicon wafer followed by patterning of the SU-8 waveguides. Temperature sensitivity of both waveguides is evaluated using the same heating source and under the same environmental conditions. Measurement results show that complex triple-arm MZI having different arm lengths offers a less linear sensitivity compared to the simple straight waveguide. [ABSTRACT FROM AUTHOR]

An on-chip-scale, up-down link conversion circuit for electro-optic signals to use in a light fidelity network application is proposed. A system consisting of a loop microring resonator (known as a Panda-ring resonator), is coupled inline to the input of a Mach-Zehnder interferometer (MZI). When the light from that source is input into the system, a fraction of the power is coupled inline through successive pumping and then circulated within the system. By using the most appropriate device parameters, the whispering gallery mode (WGM) of the light, with the inline successive pumping condition, is generated at the resonance condition. The transmitted signals are a combination of the comb and WGM signals and are obtained at the MZI output. The simulation results obtained have shown that a maximum power of 300 mW is achieved from the device. A comb signal, over the spectral band from 1.350-1.750 µm is obtained, with the center wavelength at 1.55 µm. The results show an up-downlink switching speed of is ~ 20 fs is also obtained. [ABSTRACT FROM AUTHOR]

A dark-bright soliton conversion is used to perform the two arithmetic logic unit operations namely adder and subtractor operations. The advantage of the system such as power stability, non-dispersion and the dark-bright soliton phase conversion control can be obtained. The input source into the circuit is the bright soliton pulse, with the pulse width of 35 ps, the peak power at 1.55 µm is 1 mW. By using the dark-bright soliton conversion pair, the generated logic bits can be controlled, and the secure bits can be achieved. The simulation results show the output signal with a minimum loss of only 0.1% with respect to a low input power of 1 mW, and ultra-fast response time of about 1 ps can be achieved. It gives the ultra-high bandwidth of more than 40 Gbits−1. The circuit composes six microring resonators made of InGaAsP/InP material with smaller ring radii of 1.5 µm, and the total physical scale of the circuit less than 100 µm2. [ABSTRACT FROM AUTHOR]

We theoretically analyze the detection of a cancer cell in the one-dimensional photonic crystal by infiltrating different sample cells in the cavity layer. The defect modes appear in their transmission spectra only if the nanocomposite layers are included on either side of the cavity layer. This analysis is carried out by a dielectric constant and the transmittance peak of the cancer cell is compared with the normal cell. The transmittance peak shifts are analyzed with various filling factors for optimization purposes. Through the shifting spectrum, the sensitivity of cancer cell from the normal cell is obtained from a minimum of 42 nm/RIU to a maximum of 43 nm/RIU. [ABSTRACT FROM AUTHOR]

We have proposed the use of a soliton pulse that propagates within a modified add-drop filter, which is made of a GaAsInP/P material. It is in the form of a Panda-ring resonator, from which a bright/dark soliton pulse is input into a system via an input port. The conversion between bright and dark soliton pulses is introduced at the 3 dB coupler, i.e. the change in phase of π/2. But it is not superimposed each other. The output solitons obtained at the through and drop ports are bight and dark solitons respectively. Both signals can be used to form “ON’ and “OFF” or “1” and “0”, which are useful for the digital bit generation. The switching speed of the system can be improved by employing the two nonlinear side rings. In application, secure output bits can be arranged by using the alternative input solitons or the control ports, where the input bright and dark solitons can be converted into output bits. This means that the output bits can be randomly switched between “1” and “0”, which can be identified by the sender. Moreover, the additional information can be multiplexed via the add port and transmitted in either free space or optical fiber via the whispering gallery mode and through port outputs. Finally, the electro-optic switching can be transferred and the electronic switching by the embedded stacked layers, where the ultrafast switching of light input can lead the ultrafast electrical switching speed. The switching speed of ~ 5 fs and the offset time of ~ 220 fs of the “on” and OFF” are achieved by using the selected ring parameters. [ABSTRACT FROM AUTHOR]

The electro-optic power pumping system model using the inline successive technique within the modified add-drop filter is proposed. A pumping system consists of a closed loop Panda ring resonator, from which the optical power is coupled inline into the system. By controlling the two side phase modulators, the whispering gallery mode (WGM) is generated by the amplitude-squeezed light within the modified add-drop filter. By using the proposed circuits, the low current can be applied into the system via a gold layer connection, from which the amplified output current can be obtained at the throughput port, which can be functioned as the electronic operational amplifier (op-amp). In application, the WGM output is the amplified signal that can be used for the up (down) link in free space communication network called light fidelity (LiFi). The electro-optic signals conversion can be performed by the stacked layers of silicon-graphene-gold materials. The results obtained have shown that large gain is obtained at the WGM output, which is ~ 5 × 10-6cm2(VsW)-1, when the pumping saturation time is ~ 2 fs. It concludes the suitability of our proposed model for light fidelity, LiFi up-down link conversion. [ABSTRACT FROM AUTHOR]

The design of the microsensor system for biosensors using the plasmonic island is proposed. The sensor head is formed by the stacked layers of silicon-graphene-gold materials. The dual-mode operations of the sensor can be performed using the relationship of the changes between the electron mobility and optical phase, where the exciting environment can be light intensity (phase), electrical transient, heat, pressure, flavour and smoke, The change in light phase (intensity) in silicon and conductivity (mobility) in gold layers cause change in the output measurands. The design and simulation interpretation of the sensor is presented. The sensor manipulation using the MCM arrangement is simulated and interpreted for biosensor applications 3D imaging can also be applied to the MCM function, where the 3D in situ sensor function is possible. The sensor sensitivity of 2.0 × 10−21 cm2 V−1 s−1 (mW)−1 via simulation is obtained. [ABSTRACT FROM AUTHOR]

The plasmonic electronic component consists of the stacked layers of silicon-graphene-gold materials can be integrated with the driven group velocity system, which is nonlinear microring resonator. This determines the suitable driven velocity in controlling the side ring phase modulators. In such a case, the proposed system can give the advantage of the greater switching speed and the hybrid function between electronic and light signals. The obtained I-V output characteristics of the transmitted results have shown that the proposed circuit can function to be the electronic devices with very high stability. [ABSTRACT FROM AUTHOR]

A conventional Michelson interferometer is modified and used to form the various types of interferometers. The basic system consists of a conventional Michelson interferometer with silicon‐graphene‐gold embedded between layers on the ports. When light from the monochromatic source is input into the system via the input port (silicon waveguide), the change in optical path difference (OPD) of light traveling in the stacked layers introduces the change in the optical phase, which affects to the electron mean free path within the gold layer, induces the change in the overall electron mobility can be seen by the interferometer output visibility. Further plasmonic waves are introduced on the graphene thin film and the electron mobility occurred within the gold layer, in which the light‐electron energy conversion in terms of the electron mobility can be observed, the gold layer length is 100 nm. The measurement resolution in terms of the OPD of ∼50 nm is achieved. In applications, the outputs of the drop port device of the modified Michelson interferometer can be arranged by the different detectors, where the polarized light outputs, the photon outputs, the electron spin outputs can be obtained by the interference fringe visibility, mobility visibility and the spin up‐down splitting output energies. The modified Michelson interferometer theory and the detection schemes are given in details. Plot of the mobility visibility and the change in mean free paths, μ =  eτm= edmVF, where VF= 105ms−1 of electron in gold (Bourke and Chantler (), Physical Review Letters, 104, 206601; Gall (), Journal of Applied Physics, 119, 085101), where the mobility (input power) is fixed at 1.0 mW, the electron mass = 9.10 × 10−31kilograms, the electron charge = 1.60 × 10−19 coulombs. The refractive index of a silicon is 1.46, GaAs = 3.66 and Au = 0.61. The fringe peak to peak is obtained at Δt= 2.5 fs, is 0.5 × 10−7m or 50 nm, where (a) the blue color is the through port output signals and the red color is the drop port output signals, (b) the black and white signals of Figure 5a. The interference fringes of the interferometer are seen at the drop port. [ABSTRACT FROM AUTHOR]

Abstract: We present a design of micro‐conjugate mirror using a nonlinear microring resonator, which is made of GaAsInP/P, is rapidly achieving widespread option in several three‐dimensional (3D) imaging applications. By exploiting the conjugate mirror properties, the 3D light probes can be formed by the whispering gallery modes (WGM) in which the WGM probe is also available within a nonlinear microring resonator. It is important to understand, these light probes use the similar functional principle to provide structured light through the object, just as the reference beams to light up and develop a hologram using the holographic method. The interference of 2 beams constructs the 3D image which can be seen by the naked‐eye while providing the 3D perception. The simulation results obtained from the transmission of 3D imaging are processed using MATLAB and OptiFDTD are compared and analyzed. These convincing theoretical results suggest that the proposed method can be used in practice to realize the naked‐eye 3D imaging with convincing visual perception and efficient transmission while providing the ultimate mode of convenience for viewers. [ABSTRACT FROM AUTHOR]

This letter presents the use of a plasmonic sensing transducer on an embedded Mach–Zehnder interferometer (MZI) arm, allowing the sensing transducer to be formed through the stacked layers of the silicon–graphene–gold materials and embedded on an MZI arm with a gripping force to allow it to be used in sensing applications. The transduction process introduces an energy conversion between the input light and the excited electron mobility within the silicon and graphene layers. That way the electron drift velocity within the gold layer can drive the plasmonic wave group velocity induced through the interaction with the graphene layers, and consequently, the electron mobility in the gold layer increases. The driven electron mobility in the gold layer, caused by the plasmonic waves from graphene in the embedded sensing layers, will affect the electron output mobility, where the relative change in the phase of the light in the silicon can be seen at the output port of the MZI. To optimize the key parameters of such a system (especially input optical power and dimensions of the gold layer), simulations are performed at various input optical powers and the results are graphically represented. A maximum sensitivity of ~ $2\times {10}^{-14}$ mV−1s−1 in electron mobility sensing is obtained through these simulations, designed to optimize the performance characteristics of the proposed sensor. [ABSTRACT FROM AUTHOR]