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Terahertz radiation and the skin: a review [PDF]
Journal of Biomedical Optics, 2021 Terahertz (THz) radiation has demonstrated a great potential in biomedical applications over the past three decades, mainly due to its non-invasive and label-free nature. Among all biological specimens, skin tissue is an optimal sample for the application of THz-based methods because it allows for overcoming some intrinsic limitations of the technique,
Peter S. Timashev +14 more
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Terahertz radiation of jerk photocurrent [PDF]
Physical Review B, 2020 We compute the jerk current tensor of GaAs, Si, and ferroelectric single-layer GeS, GeSe, SnS, and SnSe. We find peak values of the order of $10^{14}$ mA/V$^3$s$^2$ in GaAs and Si within the visible energy spectrum and an order of magnitude larger in single-layer GeS, GeSe, SnSe and SnS.
Bernardo S. Mendoza, Benjamin M. Fregoso
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Graphene hyperlens for terahertz radiation [PDF]
Physical Review B, 2012 We propose a graphene hyperlens for the terahertz (THz) range. We employ and numerically examine a structured graphene-dielectric multilayered stack that is an analogue of a metallic wire medium. As an example of the graphene hyperlens in action we demonstrate an imaging of two point sources separated with distance $ _{0}/5$.
Andryieuski, Andrei +2 more
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Bow-Tie Cavity for Terahertz Radiation [PDF]
Photonics, 2018 We report on the development, testing, and performance analysis of a bow-tie resonant cavity for terahertz (THz) radiation, injected with a continuous-wave 2.55 THz quantum cascade laser. The bow-tie cavity employs a wire-grid polarizer as input/output coupler and a pair of copper spherical mirrors coated with an unprotected 500 nm thick gold layer ...
Consolino L +7 more
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Terahertz radiation for tomographic inspection [PDF]
Optical Engineering, 2012 Three-dimensional (3-D) terahertz computed tomography has already been performed with three different reconstruction methods (standard back-projection algorithm and two iterative analyses) to reconstruct 3-D objects. A Gaussian beam model is developed according to the physical properties of terahertz waves such as the energy distribution within the ...
Recur, Benoît +9 more
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Phase-Insensitive Scattering of Terahertz Radiation [PDF]
Photonics, 2017 The nonlinear interaction between Near-Infrared (NIR) and Terahertz pulses is principally investigated as a means for the detection of radiation in the hardly accessible THz spectral region. Most studies have targeted second-order nonlinear processes, given their higher efficiencies, and only a limited number have addressed third-order nonlinear ...
Mihail Petev +10 more
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Nanoconcentration of terahertz radiation in plasmonic waveguides [PDF]
Optics Express, 2008 8 pages, 5 ...
Rusina, Anastasia +3 more
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Terahertz radiation of microcavity dipolaritons [PDF]
Optics Letters, 2019 We propose the use of dipolaritons -- quantum well excitons with large dipole moment, coupled to a planar microcavity -- for generating terahertz (THz) radiation. This is achieved by exciting the system with two THz detuned lasers that leads to dipole moment oscillations of the exciton polariton at the detuning frequency, thus generating a THz emission.
A. Seedhouse +3 more
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Uncooled detectors of continuum terahertz radiation [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2011 THz continuum spectral photometry has new and unique applications in different civil and military areas presenting a number of distinctive advantages on the well known microwaves or mid- to near-infrared technologies. THz sensing is essential to investigate the emission mechanisms by high energy particle acceleration processes.
V. A. Nikolaev +14 more
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Emission of terahertz radiation from SiC [PDF]
Applied Physics Letters, 2009 We report the emission of strong coherent broadband terahertz radiation from 6H-silicon-carbide (SiC) excited with optical pulses. The measured terahertz spectral signal-to-noise ratio is better than one thousand. We determine that the terahertz radiation is generated via second order optical nonlinearity (optical rectification).
Michael G. Spencer +6 more
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