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Your search keyword '"Sze Phing Ho"' showing total 10 results
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10 results on '"Sze Phing Ho"'

1. Affordable, ultra-broadband coherent detection of terahertz pulses via CMOS-compatible solid-state devices

Author

Andrey Markov, Marco Peccianti, Sze Phing Ho, Luca Razzari, Yoann Jestin, Alessandro Busacca, Mohamed Chaker, Xin Jin, Roberto Morandotti, Anna Mazhorova, Alessia Pasquazi, Sebastien Delprat, Jalil Ali, Matteo Clerici, Alessandro Tomasino, Riccardo Piccoli, Tomasino, A, Mazhorova, A, Clerici, M, Peccianti, M, Ho, SP, Jestin, Y, Pasquazi, A, Markov, A, Jin, X, Piccoli, R, Delprat, S, Chaker, M, Busacca, A, Ali, J, Razzari, L, and Morandotti, R

Subjects
Materials science, business.industry, Terahertz radiation, Spectral density, Second-harmonic generation, Settore ING-INF/02 - Campi Elettromagnetici, 02 engineering and technology, 021001 nanoscience & nanotechnology, Settore ING-INF/01 - Elettronica, 01 natural sciences, Electromagnetic radiation, Terahertz spectroscopy and technology, Optics, Nonlinear optics, Ultrafast optics, Far infrared or terahertz, Solid state detectors, Electric field, 0103 physical sciences, Broadband, Optoelectronics, Heterodyne detection, 010306 general physics, 0210 nano-technology, business
Abstract

We demonstrate the first fully solid-state technique for the coherent detection of ultra-broadband THz pulses (0.1-10 THz), relying on the electric-field-induced second-harmonic generation attained in integrated CMOS-compatible devices.

Published
2017

2. Terahertz Field Induced Second Harmonic Coherent Detection Scheme based on a Biased Nonlinear Micro-slit

Author

Marco Peccianti, Anna Mazhorova, Jalil Ali, Luca Razzari, Matteo Clerici, Sze Phing Ho, Alessia Pasquazi, and Roberto Morandotti

Subjects
Physics, Optics, Terahertz gap, Field (physics), business.industry, Terahertz radiation, Electric field, Harmonic, Second-harmonic generation, Optoelectronics, Heterodyne detection, business, Terahertz spectroscopy and technology
Abstract

We demonstrated coherent Terahertz characterization based on Terahertz Field Induced Second Harmonic effect in a Silica samples, operated with 10-100 V sources. Our sample is an infinitely long 30 μm slit written in gold. Our results pave the way to a novel approach towards broadband THz detection.

Published
2014

3. On Chip Broadband Terahertz Detection via Four-Wave Mixing in Electrically Biased Silica Micro-Slits

Author

Marco Peccianti, Jalil Ali, Matteo Clerici, Roberto Morandotti, Luca Razzari, Alessia Pasquazi, Sze Phing Ho, and Anna Mazhorova

Subjects
Terahertz gap, Materials science, business.industry, Terahertz radiation, Far-infrared laser, Physics::Optics, Terahertz spectroscopy and technology, Photomixing, Four-wave mixing, Optics, Broadband, Optoelectronics, Heterodyne detection, business
Abstract

Exploiting four-wave mixing between an optical probe and a Terahertz field in a few micrometers thick Silica sample we demonstrate broadband coherent Terahertz detection by applying a bias as low as 100 V.

Published
2014

4. Exact reconstruction of thz sub-λ source features in knife-edge measurements

Author

Alessia Pasquazi, Marco Peccianti, Roberto Morandotti, Sze Phing Ho, Lucia Caspani, Tsuneyuki Ozaki, Jalil Ali, Matteo Clerici, A. C. Busacca, Fabrizio Buccheri, Peccianti, M, Clerici, M, Pasquazi, A, Caspani, L, Ho, SP, Buccheri, F, Ali, J, Busacca, A, Ozaki, T, and Morandotti, R

Subjects
Physics, Coupling, Phase-sensitive field characterization, Blade (geometry), Terahertz radiation, business.industry, Settore ING-INF/02 - Campi Elettromagnetici, Edge (geometry), Lambda, subwavelength source, Settore ING-INF/01 - Elettronica, Source field, Atomic and Molecular Physics, and Optics, Optics, Sampling (signal processing), subwavelength sources, spatiotemporal field characterization, Electrical and Electronic Engineering, Time-resolved spectroscopy, business, terahertz (THz) sources
Abstract

The spatial features of a sub-wavelength terahertz source are not accessible using time-integrated knife-edge techniques due to the non-separable space-time nature of the radiated field and to systematic modifications induced by the blade itself. We show that combining knife-edge with a time resolved electro-optical sampling, the space-time coupling can be addressed and the source field profile can be exactly reconstructed.

Published
2013

5. Space-time features of THz emission from optical rectification in sub-wavelength areas

Author

Marco Peccianti, F. Buccheri, Alessandro Busacca, Tsuneyuki Ozaki, Roberto Morandotti, Sze Phing Ho, Jalil Ali, Matteo Clerici, Phing Ho, S, Peccianti, M, Buccheri, F, Clerici, M, Busacca, A, Ozaki, T, Ali, T, and Morandotti, R

Subjects
Materials science, business.industry, Terahertz radiation, Physics::Optics, Nonlinear optics, TeraHertz science and device, Settore ING-INF/01 - Elettronica, Terahertz spectroscopy and technology, Optical pumping, Optical rectification, Optics, Rectification, Microscopy, Optoelectronics, Near-field scanning optical microscope, business
Abstract

We present our investigation on the THz space-time emission characteristic induced by the non-paraxial generation regime in highly localized THz generation via optical rectification on sub-wavelength areas.

Published
2011

6. Notch Nonlinear Frequency Shift in AlGaAs Bragg Grating Waveguides

Author

Matteo Clerici, Marco Peccianti, Katarzyna A. Rutkowska, Micheal J. Strain, Alessia Pasquazi, Pamela Tannouri, Roberto Morandotti, Sze Phing Ho, Ian Rowe, and Marc Sorel

Subjects
Condensed Matter::Quantum Gases, Optical amplifier, Materials science, business.industry, Spectral density, Physics::Optics, Nonlinear optics, Spectral line, Blueshift, law.invention, Nonlinear system, Optics, Fiber Bragg grating, law, Pulse compression, Optoelectronics, Self-phase modulation, business, Optical filter, Waveguide
Abstract

We present an investigation on the nonlinear dynamics of intense pulses in an AlGaAs Bragg waveguide and we report the experimental observation of an intensity dependent blue-shift of the Bragg notch spectral line.

Published
2011

7. Spatio-temporal Characteristics of THz Emission at the Subwavelength Scale via Optical Rectification

Author

Jalil Ali, Alessandro Busacca, Matteo Clerici, Roberto Morandotti, Sze Phing Ho, Fabrizio Buccheri, Tsuneyuki Ozaki, Marco Peccianti, Phing Ho, S, Clerici, M, Peccianti, M, Buccheri, F, Busacca, A, Ozaki, T, Ali, J, and Morandotti, R

Subjects
Wavefront, Materials science, Scale (ratio), Terahertz radiation, business.industry, Near-field optics, Physics::Optics, Physics::Classical Physics, Settore ING-INF/01 - Elettronica, terahertz, nonlinear optics, Optical rectification, Optics, Microscopy, Optoelectronics, Near-field scanning optical microscope, business, Image resolution
Abstract

Highly localized THz emission via optical rectification in thin nonlinear crystals is a promising method for subwavelength microscopy. We present here the peculiar THz spatio-temporal characteristics induced by the non-paraxial generation regime.

Published
2011

8. Breakdown voltage investigation of fusion SiO 2 optical coupler switch using Pockel effect model

Author

Jalil Ali, Mohamed Fadhali, Saktioto, Sze Phing Ho, Preecha P. Yupapin, and Nor Faridah Hanim Mat Junit

Subjects
Optics, Materials science, business.industry, Electrode, Single-mode optical fiber, Physics::Optics, Volt, Breakdown voltage, business, Optical switch, Refractive index, Pockels effect, Coupling coefficient of resonators
Abstract

This paper describes a new model for the breakdown voltage of SiO 2 fiber coupler using the Pockel effect and empirical equation. The model is evaluated by using the coupling coefficient and the changes in the refractive index. We found that the breakdown voltage is in the order of 10 2 volt correspond to coupling coefficient by the order of mm -1 . Increasing the value of coupling coefficient between the electrodes leads to a reduction in the breakdown voltage.

Published
2009

9. Terahertz characterization via an all-optical, ultra-thin-knife-edge technique

Author

Marco Peccianti, Yavuz Ozturk, Alessia Pasquazi, Mostafa Shalaby, Roberto Morandotti, Jalil Ali, Matteo Clerici, and Sze Phing Ho

Subjects
Materials science, Terahertz radiation, business.industry, Far-infrared laser, Free carriers, Nonlinear optics, Physics::Optics, Edge (geometry), Terahertz spectroscopy and technology, Crystal, Photomixing, Physics::Fluid Dynamics, Four-wave mixing, Condensed Matter::Materials Science, Optics, Optoelectronics, business, Tera Hertz, ZnTe crystal
Abstract

An all-optical, terahertz characterization based on a ultra-thin-knife-edge is demonstrated employing an ultraviolet-pulse to project the image of a blade on a ZnTe crystal, where the free carriers excited on a blade-shaped area act as a field-shield.

10. Rectangular-shaped sub-wavelength terahertz beam profiling via an all-optical knife-edge technique

Author

Marco Peccianti, Yavuz Ozturk, Alessia Pasquazi, Anna Mazhorova, Mostafa Shalaby, Jalil Ali, Matteo Clerici, Sze Phing Ho, and Roberto Morandotti

Subjects
Materials science, business.industry, Terahertz radiation, Far-infrared laser, Physics::Optics, Nonlinear optics, Edge (geometry), Terahertz spectroscopy and technology, Physics::Fluid Dynamics, Crystal, Optics, Excited state, Optoelectronics, Zinc compounds, business, Beam (structure)
Abstract

An all-optical, sub-wavelength terahertz characterization technique based on an ultrathin-knife-edge is demonstrated employing ultraviolet-pulse to project the blade image on a ZnTe crystal, where the free carriers excited on a blade-shaped area act as field-shield. © 2014 OSA.

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