0000000000092817

AUTHOR

Xin Jin

showing 5 related works from this author

Antenna Tapering Strategy for Near-Field Enhancement Optimization in Terahertz Gold Nanocavities

2019

Plasmonic nanoantennas (NAs) have received a growing attention in recent years due to their ability to confine light on sub-wavelength dimensions [1]. More recently, this property has been exploited in the terahertz (THz) frequency range (0.1–10 THz) for enhanced sensing and spectroscopy [2], as well as for more fundamental investigations [3]. These applications typically require high local electric fields that can be achieved by concentrating THz radiation into deeply sub-wavelength volumes located at the NAs extremities. However, the achievable near-field enhancement values are severely limited by the poor resonance quality factor of traditional rod-shaped THz NAs. Unlike what is commonly…

Materials scienceTerahertz radiationbusiness.industryNear and far fieldTapering02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesSettore ING-INF/01 - ElettronicaResonatorGold Spectroscopy Extremities Q-factor Geometry Antennas PlasmonsOpticsElectric field0103 physical sciencesReflection (physics)Reflection coefficient010306 general physics0210 nano-technologybusinessPlasmon
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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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Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas

2020

Abstract Terahertz resonant nanoantennas have recently become a key tool to investigate otherwise inaccessible interactions of such long-wavelength radiation with nano-matter. Because of their high-aspect-ratio rod-shaped geometry, resonant nanoantennas suffer from severe loss, which ultimately limits their field localization performance. Here we show, via a quasi-analytical model, numerical simulations, and experimental evidence, that a proper tapering of such nanostructures relaxes their overall loss, leading to an augmented local field enhancement and a significantly reduced resonator mode volume. Our findings, which can also be extended to more complex geometries and higher frequencies,…

enhanced light-matter interactionMaterials scienceField (physics)business.industryTerahertz radiationPhysicsQC1-999Physics::Optics02 engineering and technology021001 nanoscience & nanotechnologySettore ING-INF/01 - Elettronica01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materials010309 opticsnanoantennas0103 physical sciencesOptoelectronicsnanoantennaElectrical and Electronic Engineering0210 nano-technologybusinessNanoscopic scaleterahertz science and technologyBiotechnologyNanophotonics
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Solid-state-biased coherent detection of ultra-broadband terahertz pulses

2017

Significant progress in nonlinear and ultrafast optics has recently opened new and exciting opportunities for terahertz (THz) science and technology, which require the development of reliable THz sources, detectors, and supporting devices. In this work, we demonstrate the first 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 in a thin layer of ultraviolet fused silica. The proposed CMOS-compatible devices, which can be realized with standard microfabrication techniques, allow us to perform ultra-broadband detection with a high dynamic range by employing probe laser powers and bias v…

coherent detectionTA1501Nonlinear opticTerahertzFar infrared or terahertzFour-wave mixingUltrafast opticDevicePhysics::OpticsUltrafast laserSolid state detectorSettore ING-INF/01 - ElettronicaQC0350Optica
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3084329.pdf

2017

Supplementary Materials

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