18 results on '"Abderrahmane Belkhir"'
Search Results
2. Surface Enhanced Raman Scattering on Regular Arrays of Gold Nanostructures: Impact of Long-Range Interactions and the Surrounding Medium
- Author
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Iman Ragheb, Macilia Braïk, Stéphanie Lau-Truong, Abderrahmane Belkhir, Anna Rumyantseva, Sergei Kostcheev, Pierre-Michel Adam, Alexandre Chevillot-Biraud, Georges Lévi, Jean Aubard, Leïla Boubekeur-Lecaque, and Nordin Félidj
- Subjects
localized surface plasmon ,surface enhanced Raman scattering ,grating effect ,gold nanodisks ,Rayleigh anomaly ,Chemistry ,QD1-999 - Abstract
Long-range interaction in regular metallic nanostructure arrays can provide the possibility to manipulate their optical properties, governed by the excitation of localized surface plasmon (LSP) resonances. When assembling the nanoparticles in an array, interactions between nanoparticles can result in a strong electromagnetic coupling for specific grating constants. Such a grating effect leads to narrow LSP peaks due to the emergence of new radiative orders in the plane of the substrate, and thus, an important improvement of the intensity of the local electric field. In this work, we report on the optical study of LSP modes supported by square arrays of gold nanodiscs deposited on an indium tin oxyde (ITO) coated glass substrate, and its impact on the surface enhanced Raman scattering (SERS) of a molecular adsorbate, the mercapto benzoic acid (4-MBA). We estimated the Raman gain of these molecules, by varying the grating constant and the refractive index of the surrounding medium of the superstrate, from an asymmetric medium (air) to a symmetric one (oil). We show that the Raman gain can be improved with one order of magnitude in a symmetric medium compared to SERS experiments in air, by considering the appropriate grating constant. Our experimental results are supported by FDTD calculations, and confirm the importance of the grating effect in the design of SERS substrates.
- Published
- 2020
- Full Text
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3. Hybridization of surface lattice modes: towards plasmonic metasurfaces with high flexible tunability
- Author
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Macilia Braïk, Théo Geronimi-Jourdain, Stéphanie Lau-Truong, Abderrahmane Belkhir, Sarra Gam-Derouich, Alexandre Chevillot-Biraud, Claire Mangeney, and Nordin Félidj
- Subjects
Electrical and Electronic Engineering ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Biotechnology - Abstract
When assembled in periodic arrangements, metallic nanostructures (NSs) support plasmonic surface lattice (SL) resonances resulting from long-range interactions these surface lattice resonances differ radically from localized surface plasmon (LSP). Similarly to the hybridization of LSP resonances, observed in short-range interactions, we demonstrate the possibility to generate a hybridization of surface lattice (SL) plasmon resonances, by the excitation of grazing order diffraction within the metasurface. This hybridization leads to the emergence of bonding and anti-bonding modes. If hybridization of LSP modes has been widely described in recent literature, there is still no experimental proof-of-concept reporting such hybridization with SL plasmon resonances. We fill this gap in the present paper by considering surfaces made of binary arrays with unit cells made of two gold disks of distinct diameters. We demonstrate the possibility to maximize or cancel the interaction between the hybridized SL resonances by simply controlling the distance between particles. All our experimental results are supported by FDTD calculations. The hybridization of SL modes results in much richer hybridization scenario in terms of wavelength and quality factor control, compared to a hybridization of LSP in a short-range configuration. It offers unprecedented opportunities to generate innovative optical devices, with high flexible tunability.
- Published
- 2023
4. Numerical study of an efficient light focusing nano-coupler based on C-shaped waveguides
- Author
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O. Lamrous, Abderrahmane Belkhir, Zahia Kebci, Fadhila Chehami, Fadi Issam Baida, Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Femto-st, Optique
- Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics] ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,General Engineering ,General Physics and Astronomy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,0103 physical sciences ,C shaped ,Nano ,Optoelectronics ,010306 general physics ,0210 nano-technology ,business - Abstract
International audience; We present an FDTD simulation study of a new design of light focusing nano-coupler consisting of a tapered succession of C-shaped silver waveguides. Its operation is based on the use of the fundamental guided mode
- Published
- 2021
5. Half-wave plate based on a birefringent metamaterial in the visible range
- Author
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Abdelaziz Mezeghrane, Fadi Issam Baida, Thinhinane Zeghdoudi, Abderrahmane Belkhir, Zahia Kebci, Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Femto-st, Optique
- Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics] ,Materials science ,Opacity ,Aperture ,FOS: Physical sciences ,Physics::Optics ,02 engineering and technology ,01 natural sciences ,Waveplate ,010309 optics ,Optics ,0103 physical sciences ,Transmission coefficient ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,Birefringence ,business.industry ,Finite-difference time-domain method ,Metamaterial ,Computational Physics (physics.comp-ph) ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Photonics ,0210 nano-technology ,business ,Physics - Computational Physics ,Optics (physics.optics) ,Physics - Optics - Abstract
In the present paper, a half-wave plate (HWP) based on a birefringent metamaterial is numerically designed to operate in the visible range. The proposed structure consists of an array of double-pattern perpendicular rectangular aperture (RAA) engraved into opaque silver film deposited on a glass substrate. One of the apertures is glass filled. The operating principle of this plate is based on the excitation and the propagation of one guided mode inside each aperture but with different effective index. At the output side, a phase difference is obtained whose value mainly depends on the metal thickness. We have investigated the most simplest configurations using a homemade code based on the finite difference time domain method to design a half-plate with optimized efficiency resulting in transmission coefficient of more than $60\%$ together with a birefringence of $2.1$ at an operation wavelength of 737 nm. This kind of anisotropic metasurface promises a wide range of applications in integrated photonics., pages, 8 figures, Original paper
- Published
- 2021
6. Surface Enhanced Raman Scattering on Regular Arrays of Gold Nanostructures: Impact of Long-Range Interactions and the Surrounding Medium
- Author
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Sergei Kostcheev, Anna Rumyantseva, Pierre-Michel Adam, Abderrahmane Belkhir, Georges Lévi, Leïla Boubekeur-Lecaque, Alexandre Chevillot-Biraud, Nordin Félidj, Macilia Braik, Iman Ragheb, Stéphanie Lau-Truong, Jean Aubard, Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS (UMR_7086)), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Lumière, nanomatériaux et nanotechnologies (L2n), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université de Paris, Laboratoire ITODYS, CNRS, F-75006 Paris, Université Mouloud Mammeri de Tizi-Ouzou, LPCQ, BP 17 RP, 15000 Tizi-Ouzou, and Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)
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Nanostructure ,Materials science ,General Chemical Engineering ,Nanoparticle ,Physics::Optics ,02 engineering and technology ,Substrate (electronics) ,Grating ,01 natural sciences ,Article ,010309 optics ,lcsh:Chemistry ,grating effect ,[SPI]Engineering Sciences [physics] ,symbols.namesake ,0103 physical sciences ,surface enhanced Raman scattering ,[CHIM]Chemical Sciences ,General Materials Science ,gold nanodisks ,ComputingMilieux_MISCELLANEOUS ,[PHYS]Physics [physics] ,Rayleigh anomaly ,localized surface plasmon ,business.industry ,021001 nanoscience & nanotechnology ,lcsh:QD1-999 ,symbols ,Optoelectronics ,0210 nano-technology ,business ,Refractive index ,Excitation ,Raman scattering ,Localized surface plasmon - Abstract
International audience; Long-range interaction in regular metallic nanostructure arrays can provide the possibility to manipulate their optical properties, governed by the excitation of localized surface plasmon (LSP) resonances. When assembling the nanoparticles in an array, interactions between nanoparticles can result in a strong electromagnetic coupling for specific grating constants. Such a grating effect leads to narrow LSP peaks due to the emergence of new radiative orders in the plane of the substrate, and thus, an important improvement of the intensity of the local electric field. In this work, we report on the optical study of LSP modes supported by square arrays of gold nanodiscs deposited on an indium tin oxyde (ITO) coated glass substrate, and its impact on the surface enhanced Raman scattering (SERS) of a molecular adsorbate, the mercapto benzoic acid (4-MBA). We estimated the Raman gain of these molecules, by varying the grating constant and the refractive index of the surrounding medium of the superstrate, from an asymmetric medium (air) to a symmetric one (oil). We show that the Raman gain can be improved with one order of magnitude in a symmetric medium compared to SERS experiments in air, by considering the appropriate grating constant. Our experimental results are supported by FDTD calculations, and confirm the importance of the grating effect in the design of SERS substrates.
- Published
- 2020
7. Extraordinary nonlinear transmission modulation in a doubly resonant acousto-optical structure
- Author
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Fadi Issam Baida, Abdullah F. Alabiad, Vincent Laude, Sarah Benchabane, Abdelkrim Khelif, Mahmoud Addouche, Abderrahmane Belkhir, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Diffraction ,Materials science ,Physics::Optics ,02 engineering and technology ,01 natural sciences ,Signal ,[SPI.MAT]Engineering Sciences [physics]/Materials ,Optics ,0103 physical sciences ,[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,010306 general physics ,[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph] ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,business.industry ,Fano resonance ,Acoustic wave ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Wavelength ,Surface wave ,Modulation ,Optoelectronics ,Photonics ,0210 nano-technology ,business - Abstract
International audience; Acousto-optical modulators usually rely on coherent diffraction of light by a moving acoustic wave, leading to bulky devices with a long interaction length. We propose a subwavelength acousto-optical structure that instead relies on a double resonance to achieve strong modulation at near-infrared wavelengths. A periodic array of metal ridges on a piezoelectric substrate defines cavities that create a resonant dip in the optical transmission spectrum. The ridges simultaneously support large flexural vibrations when resonantly excited by a radio-frequency signal, effectively deforming the cavities and leading to strongly nonlinear acousto-optical modulation. The nano-optical structure could find applications in highly compact photonic devices.
- Published
- 2017
8. Extraordinary blueshift of a photonic crystal nanocavity by reducing its mode volume with an opaque microtip
- Author
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G. Le Gac, T.-Ph. Vo, A. El Eter, Fadi Issam Baida, Mathieu Mivelle, Christian Seassal, S. Callard, Adel Rahmani, Dusan Nedeljkovic, Abderrahmane Belkhir, Thierry Grosjean, C. Ecoffey, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Lovalite S.A.S., AUTRES, INL - Nanophotonique (INL - Photonique), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)
- Subjects
Mode volume ,Materials science ,Physics and Astronomy (miscellaneous) ,Opacity ,business.industry ,Nanophotonics ,Physics::Optics ,Resonance ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Dielectric ,7. Clean energy ,01 natural sciences ,Redshift ,Blueshift ,010309 optics ,Optics ,0103 physical sciences ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Optoelectronics ,[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,010306 general physics ,business ,ComputingMilieux_MISCELLANEOUS ,Photonic crystal ,Applied Physics - Abstract
We demonstrate a method to reduce the mode volume of optical micro/nanocavities by positioning an opaque microtip in close proximity of the structures. This concept is used to blueshift the resonance of an active photonic crystal nanocavity by up to 16 nm. This tuning range is shown to be about 10 times larger than the redshift achieved with a bare dielectric microtip of the same size and shape. By imagining materials or multilayered devices with the ability to become transparent and opaque under external control, the blue and redshifts of the resonance would become possible with a single perturbing device. © 2012 American Institute of Physics.
- Published
- 2012
9. Implementation of the critical points model in a SFM-FDTD code working in oblique incidence
- Author
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Fadi Issam Baida, Abderrahmane Belkhir, M. Hamidi, O. Lamrous, Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Acoustics and Ultrasonics ,Field (physics) ,business.industry ,Computer science ,Nanostructured materials ,Finite-difference time-domain method ,Physics::Optics ,02 engineering and technology ,Grating ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Resonance (particle physics) ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,010309 optics ,Optics ,0103 physical sciences ,Code (cryptography) ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Oblique incidence ,0210 nano-technology ,business ,Plasmon - Abstract
International audience; We describe the implementation of the critical points model in a finite-difference-time-domain code working in oblique incidence and dealing with dispersive media through the split field method. Some tests are presented to validate our code in addition to an application devoted to plasmon resonance of a gold nanoparticles grating.
- Published
- 2011
10. Enhanced optical transmission by light coaxing: Mechanism of the TEM-mode excitation
- Author
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D. Van Labeke, Elsie Barakat, C. Diebold, Abderrahmane Belkhir, O. Arar, Fadi Issam Baida, C. Chemrouk, N. Perry, Jean Dahdah, Maria-Pilar Bernal, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
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Materials science ,Opacity ,FDTD ,General Physics and Astronomy ,Physics::Optics ,02 engineering and technology ,01 natural sciences ,7. Clean energy ,010309 optics ,Nano-waveguides ,Optics ,Structural Biology ,0103 physical sciences ,General Materials Science ,Enhanced transmission ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,business.industry ,Photovoltaic system ,Finite-difference time-domain method ,Cell Biology ,[PHYS.MECA]Physics [physics]/Mechanics [physics] ,021001 nanoscience & nanotechnology ,Transverse mode ,Mechanism (engineering) ,Transverse plane ,Transmission (telecommunications) ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,0210 nano-technology ,business ,Excitation - Abstract
International audience; This paper presents a theoretical study showing the mechanism of light transmission through opaque metallic films perforated with nanocoaxial apertures thanks to the excitation of their cutoff-free TEM (Transverse ElectroMagnetic) guided mode. Full three-dimensional Finite Difference Time Domain (3D-FDTD) together with a Body-Of-Revolution FDTD simulation results are presented and discussed in order to optimize this extraordinary transmission. Very promising findings are pointed out opening the path to the design of new devices for both nano-optic and photovoltaic applications.
- Published
- 2010
11. Implementation of dispersion models in the split-field-finite-difference-time-domain algorithm for the study of metallic periodic structures at oblique incidence
- Author
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S. S. Benabbes, Fadi Issam Baida, Abderrahmane Belkhir, O. Arar, O. Lamrous, Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,Field (physics) ,Mathematical analysis ,Finite-difference time-domain method ,01 natural sciences ,010309 optics ,Finite difference time domain algorithm ,Transmission (telecommunications) ,Angle of incidence (optics) ,0103 physical sciences ,Dispersion (optics) ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Code (cryptography) ,Oblique incidence ,010306 general physics ,Mathematics - Abstract
We extend here the finite-difference-time-domain (FDTD) algorithm working in oblique incidence to dispersive media. The split-field method (SFM) is used and adapted for taking into account the metal dispersion. The additional equations to the FDTD algorithm are given. Instead of the 24 field components usually used in the SFM, 38 and 112 field components are needed to implement the cases of Drude and Drude-Lorentz dispersion models, respectively. Some tests are presented to validate our code as long as the angle of incidence is lower than $76\ifmmode^\circ\else\textdegree\fi{}$ in addition to an application dealing with enhanced transmission and showing original results.
- Published
- 2009
12. Split-field FDTD method for oblique incidence study of periodic dispersive metallic structures
- Author
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Abderrahmane Belkhir, Fadi Issam Baida, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), and Université Mouloud Mammeri [Tizi Ouzou] (UMMTO)
- Subjects
Physics ,Field (physics) ,business.industry ,Plane wave ,Finite-difference time-domain method ,Physics::Optics ,020206 networking & telecommunications ,02 engineering and technology ,Dielectric ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,010309 optics ,symbols.namesake ,Optics ,Fourier transform ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,symbols ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Periodic boundary conditions ,business ,Dispersion (water waves) ,Photonic crystal - Abstract
International audience; The study of periodic structures illuminated by a normally incident plane wave is a simple task that can be numerically simulated by the finite-difference time-domain (FDTD) method. On the contrary, for off-normal incidence, a widely modified algorithm must be developed in order to bypass the frequency dependence appearing in the periodic boundary conditions. After recently implementing this FDTD algorithm for pure dielectric materials, we here extend it to the study of metallic structures where dispersion can be described by analytical models. The accuracy of our code is demonstrated through comparisons with already-published results in the case of 1D and 3D structures.
- Published
- 2009
13. Superfocusing and Light Confinement by Surface Plasmon Excitation Through Radially Polarized Beam
- Author
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Fadi Issam Baida, Abderrahmane Belkhir, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique, and Université Mouloud Mamerri
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Diffraction ,Biophysics ,Nanophotonics ,Near and far field ,02 engineering and technology ,01 natural sciences ,Biochemistry ,law.invention ,010309 optics ,Optics ,Optical microscope ,Nanofocus ,law ,0103 physical sciences ,Surface plasmon excitation ,Physics ,business.industry ,Surface plasmon ,Antenna effect ,021001 nanoscience & nanotechnology ,Microscope probe ,Near field ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Optoelectronics ,0210 nano-technology ,business ,Taper ,Guide ,Biotechnology ,Localized surface plasmon - Abstract
International audience; We theoretically demonstrate the possibility of obtaining nanosources through an original schema based on the generation of the radially polarized surface plasmon mode of a cylindrical metallic tip. This mode has no cutoff radius and can propagate along the tip walls until its nanometric-sized apex. Instead of radiating from the tip end, the guided mode will give rise to a nanospotlight via the well-known antenna effect. 3D calculations demonstrate that both surface plasmon-guided mode and antenna effect are directly involved in the light confinement. Near-field optical microscopy can benefit significantly from this kind of probe because the sample does not need to be directly illuminated.
- Published
- 2009
14. Three-dimensional finite-difference time-domain algorithm for oblique incidence with adaptation of perfectly matched layers and nonuniform meshing: Application to the study of a radar dome
- Author
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Fadi Issam Baida, Abderrahmane Belkhir, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Electromagnetic field ,Computer simulation ,Mathematical analysis ,Finite difference method ,020206 networking & telecommunications ,Geometry ,02 engineering and technology ,Grid ,01 natural sciences ,Domain (mathematical analysis) ,law.invention ,010309 optics ,Perfectly matched layer ,PACS: 02.70.Bf, 42.25.Bs, 02.70.c, 02.60.Cb ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Radar ,Perfect conductor ,Mathematics - Abstract
International audience; The three-dimensional finite-difference time-domain 3D-FDTD method is developed and implemented in the case of oblique incidence in order to study biperiodic structures that are finished according to the third direction. The perfectly matched layer PML is adapted to the developed algorithm. The electromagnetic fields of Maxwell's equations in the main grid and in the PML media are transferred from the E-H domain to the mapped P-Q domain. The modified Maxwell's equations are implemented by the split-field method SFM. Several tests are made and presented in order to verify and demonstrate the accuracy of our codes. The obtained results are in good agreement with published ones obtained by other methods. The originality of this paper comes, first from the fact that it brings a complete development of the used algorithm, and second, from the study of the spectral response of a radar dome based on annular aperture arrays perforated into a perfect conductor plate.
- Published
- 2008
15. Localized surface plasmon enhanced emission of organic light emitting diode coupled to DBR-cathode microcavity by using silver nanoclusters
- Author
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Mahmoud Chakaroun, Alexis Fischer, Samira Khadir, O. Lamrous, Abderrahmane Belkhir, and Azzedine Boudrioua
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Materials science ,Physics::Instrumentation and Detectors ,business.industry ,Surface plasmon ,Physics::Optics ,Electroluminescence ,Distributed Bragg reflector ,Atomic and Molecular Physics, and Optics ,Cathode ,Nanoclusters ,law.invention ,Optics ,law ,OLED ,Optoelectronics ,Spontaneous emission ,business ,Localized surface plasmon - Abstract
In this work, we aim to increase the emission of the standard guest-host organic light emitting diode (OLED) thanks to localized surface plasmon and to investigate this effect in a microcavity. As a first step, we consider thermal deposition of silver clusters within an OLED guest-host stack. We investigate both the influence of the size of silver nanoparticles (Ag-NPs) and their position within the OLED heterostructure. Secondly, we study the optimized OLED within a microcavity formed by Al-cathode top mirror and a Distributed Bragg Reflector (DBR) bottom mirror. The experimental results show a substantial enhancement of the electroluminescence (EL) intensity as well as a reduction of the spectral width at a half maximum.
- Published
- 2015
16. Subwavelength metallic coaxial waveguides in the optical range: Role of the plasmonic modes
- Author
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Fadi Issam Baida, O. Lamrous, Abderrahmane Belkhir, D. Van Labeke, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des sciences et matériaux pour l'électronique et d'automatique (LASMEA), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,Materials science ,Field (physics) ,business.industry ,Attenuation ,Surface plasmon ,Physics::Optics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,010309 optics ,Wavelength ,Optics ,0103 physical sciences ,Dispersion (optics) ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Cutoff ,0210 nano-technology ,business ,Electrical conductor ,Plasmon - Abstract
International audience; A theoretical investigation is presented of the mode propagation and attenuation in a nanometric coaxial waveguide in real metal. By a rapid comparison with other structures, it is established that a coaxial waveguide has propagative modes with very interesting properties: the cutoff wavelengths are very large, they become larger when a perfectly electric conductor is replaced by gold or silver (real metal), and they can be increased when the outer and inner radii are very close one to other. By studying dispersion curves and field structures, it is shown that surface plasmon modes are responsible for these properties. By simply changing the geometrical parameters of the structure, a very large effective index and very low group velocities could be obtained. We also establish that, in spite of the metal losses, a reasonable large propagation length could be obtained (50 µm) which should allow applications for guiding light in nano-optics.
- Published
- 2006
17. Origin of the super-enhanced light transmission through a 2-D metallic annular aperture array: a study of photonic bands
- Author
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Gérard Granet, D. Van Labeke, Abderrahmane Belkhir, Fadi Issam Baida, Antoine Moreau, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des sciences et matériaux pour l'électronique et d'automatique (LASMEA), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,Physics and Astronomy (miscellaneous) ,Cutoff Wavelength ,Aperture ,General Physics and Astronomy ,Physics::Optics ,02 engineering and technology ,Effective Index ,Bloch Vector ,01 natural sciences ,010309 optics ,Optics ,Normal mode ,Dispersion relation ,0103 physical sciences ,Dispersion (optics) ,Metal Thickness ,Photonic crystal ,Physics ,business.industry ,General Engineering ,Finite-difference time-domain method ,021001 nanoscience & nanotechnology ,Photonics ,Coaxial ,0210 nano-technology ,business ,Photonic Crystal - Abstract
Recently a new structure showing a super-enhanced transmission [Optics Commun. 209, 17–22 (2002); Phys. Rev. B, 67, 155314, (2003)] has been proposed. The origin of this phenomenon was not clearly explained. In this paper, by using a numerical Order-N FDTD spectral method, we study the eigenmodes, the band structure and the dispersion curves of a photonic 2-D crystal made with coaxial circular cavities and made from a real metal. We show that the super-enhanced transmission of the finite structure is due to a cavity resonance of a single guided mode. An extensive characterization of this mode is presented, in terms of the spatial mode structure and effective index dispersion curve.
- Published
- 2004
18. Slanted annular aperture arrays as enhanced-transmission metamaterials: Excitation of the plasmonic transverse electromagnetic guided mode
- Author
-
Fadi Issam Baida, Roland Salut, Abdoulaye Ndao, Abderrahmane Belkhir, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou] (LPCQ ), and Université Mouloud Mammeri [Tizi Ouzou] (UMMTO)
- Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Nanophotonics ,Physics::Optics ,Metamaterial ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Photonic metamaterial ,010309 optics ,Transverse plane ,Wavelength ,Optics ,Transmission (telecommunications) ,Transmission electron microscopy ,0103 physical sciences ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,0210 nano-technology ,business ,Plasmon - Abstract
International audience; We present here the fabrication and the optical characterization of slanted annular aperture arrays engraved into silver film. An experimental enhanced transmission based on the excitation of the cutoff-less plasmonic guided mode of the nano-waveguides (the transmission electron microscopy mode) is demonstrated and agrees well with the theoretical predicted results. By the way, even if it is less efficient (70% → 20%), an enhanced transmission can occur at larger wavelength value (720 nm-930 nm) compared to conventional annular aperture arrays structure by correctly setting the metal thickness.
- Published
- 2013
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