0000000000937528

AUTHOR

Diego Caraffini

showing 2 related works from this author

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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Ultra-broadband terahertz time domain spectroscopy by Solid State Biased Coherent Detection

2017

The spectral fingerprint of ibuprofen within the THz frequency window has been retrieved through an ultra-broadband THz Time Domain Spectrometry set-up. The latter implements the Solid State Biased Coherent Detection scheme, based on a compact CMOS-compatible integrated device. Such a technique shows unprecedented advantages in term of bandwidth (greater than 10 THz) over other solid state methods like electro-optic sampling.

Physicsbusiness.industryTerahertz radiationBandwidth (signal processing)Solid-stateNonlinear optics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesOptics0103 physical sciencesBroadbandTime domain010306 general physics0210 nano-technologybusinessTerahertz time-domain spectroscopySpectroscopy2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
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