Results 21 to 30 of about 11,658 (306)
Terahertz polarization imaging
Optics Letters, 2005 We present a new method to measure the polarization state of a terahertz pulse by using a modified electro-optic sampling setup. To illustrate the power of this method, we show two examples in which the knowledge of the polarization of the terahertz pulse is essential for interpreting the results: spectroscopy measurements on polystyrene foam and ...
Van der Valk, N.C.J. (author) +2 more
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Design of 2D TeraHertz band-gap photonic waveguides using an accelerated integral equation technique [PDF]
, 2009 This paper describes the application of the buffered block forward backward (BBFB) method to the problem of modeling 2D terahertz (THz) photonic band gap waveguides at the frequency of 3 THz.
D. Bogusevschi +7 more
core +1 more source
Near-Field Analysis of Terahertz Pulse Generation From Photo-Excited Charge Density Gradients [PDF]
, 2015 Excitation of photo-current transients at semiconductor surfaces by subpicosecond optical pulses gives rise to emission of electromagnetic pulses of terahertz (THz) frequency radiation.
Natrella, M +12 more
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Metamaterial-Based Terahertz Imaging [PDF]
IEEE Transactions on Terahertz Science and Technology, 2015 This article presents the design of an innovative, low-cost, uncooled, metamaterial based terahertz (THz) focal plane array (FPA). A single pixel is composed of a resonant metamaterial absorber and micro-bolometer sensor integrated in a standard 180 nm CMOS process.
Escorcia Carranza, Ivonne +3 more
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Accurate determination of terahertz optical constants by vector network analyzer of Fabry-Perot response [PDF]
, 2013 This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.38.005438.
Wang, X +4 more
core +1 more source
Nanomaterials, 2021 In this work, we propose a structure consisting of three metamaterial layers and a metallic grating layer to rotate the polarization of arbitrary linearly polarized incidence to the y-direction with high transmissivity by electrically tuning these ...
Zhenyu Yang +8 more
doaj +1 more source
THz QCL - Based active imaging applied to composite materials diagnostic [PDF]
, 2009 This paper is a presentation of the recently developed researches at OLIMPES laboratory in the field of active imaging using THz Quantum Cascade Laser applied to composite materials ...
Yoann Petitjean +9 more
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Theoretical Investigation on Microcavity Coupler for Terahertz Quantum-Well Infrared Photodetectors
IEEE Access, 2020 Resonant behaviors and absorption enhancement of metallic grating-dielectric-metal (GDM) microcavity are theoretically investigated. The GDM structure is treated as periodic unit cells of two serially-connected metal-dielectric-metal (MDM) and air ...
Xuguang Guo +5 more
doaj +1 more source
Application of terahertz spectroscopy to the characterization of biological samples using birefringence silicon grating [PDF]
, 2012 We present a device and method for performing vector transmission spectroscopy on biological specimens at terahertz (THz) frequencies. The device consists of artificial dielectric birefringence obtained from silicon microfluidic grating structures. The
Saha, S.C. +3 more
core +1 more source
Aspheric lenses for terahertz imaging
Optics Express, 2008 We present novel designs for aspheric lenses used in terahertz (THz) imaging. As different surfaces result in different beam shaping properties and in different losses from reflection and absorption, the resultant imaging resolution (i.e. the focal spot size) depends critically on the design approach.
Lo, Yat, Leonhardt, Rainer
openaire +3 more sources