0000000000347238

AUTHOR

Sze Phing Ho

showing 6 related works from this author

3084329.pdf

2017

Supplementary Materials

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

2013

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.

PhysicsCouplingPhase-sensitive field characterizationBlade (geometry)Terahertz radiationbusiness.industrySettore ING-INF/02 - Campi ElettromagneticiEdge (geometry)Lambdasubwavelength sourceSettore ING-INF/01 - ElettronicaSource fieldAtomic and Molecular Physics and OpticsOpticsSampling (signal processing)subwavelength sourcesspatiotemporal field characterizationElectrical and Electronic EngineeringTime-resolved spectroscopybusinessterahertz (THz) sources
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Affordable, ultra-broadband coherent detection of terahertz pulses via CMOS-compatible solid-state devices

2017

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.

Materials sciencebusiness.industryTerahertz radiationSpectral densitySecond-harmonic generationSettore ING-INF/02 - Campi Elettromagnetici02 engineering and technology021001 nanoscience & nanotechnologySettore ING-INF/01 - Elettronica01 natural sciencesElectromagnetic radiationTerahertz spectroscopy and technologyOpticsNonlinear optics Ultrafast optics Far infrared or terahertz Solid state detectorsElectric field0103 physical sciencesBroadbandOptoelectronicsHeterodyne detection010306 general physics0210 nano-technologybusinessConference on Lasers and Electro-Optics
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Space-time features of THz emission from optical rectification in sub-wavelength areas

2011

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.

Materials sciencebusiness.industryTerahertz radiationPhysics::OpticsNonlinear opticsTeraHertz science and deviceSettore ING-INF/01 - ElettronicaTerahertz spectroscopy and technologyOptical pumpingOptical rectificationOpticsRectificationMicroscopyOptoelectronicsNear-field scanning optical microscopebusiness
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Asymmetric Dual-Grating Micro-Slit Configuration for Broadband Solid State Coherent Detection of THz Pulses

2016

We demonstrated solid-state broadband coherent Terahertz characterization based on the Terahertz Field Induced Second Harmonic effect in Silica. The THz detector consists of an asymmetric micro-slit array which can be operated at 200V applied bias.

Materials scienceField (physics)business.industryTerahertz radiationSolid-statePhysics::Optics02 engineering and technologyGrating021001 nanoscience & nanotechnology01 natural sciencesSlitTerahertz spectroscopy and technology0103 physical sciencesBroadbandHarmonicOptoelectronics010306 general physics0210 nano-technologybusiness
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Spatio-temporal Characteristics of THz Emission at the Subwavelength Scale via Optical Rectification

2011

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.

WavefrontMaterials scienceScale (ratio)Terahertz radiationbusiness.industryNear-field opticsPhysics::OpticsPhysics::Classical PhysicsSettore ING-INF/01 - Elettronicaterahertz nonlinear opticsOptical rectificationOpticsMicroscopyOptoelectronicsNear-field scanning optical microscopebusinessImage resolutionAdvanced Photonics
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