Results 21 to 30 of about 1,799,704 (293)
Frontiers in Physics, 2021 When terahertz imaging technology is used for the nondestructive testing of composite materials, the signal is often affected by the experimental environment and internal noise of the system, as well as the absorption and scattering effect of the tested ...
Zhilong Li +8 more
doaj +1 more source
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
openaire +5 more sources
Generalized Persistent Polar Format Algorithm for Fast Imaging of Airborne Video SAR
Remote Sensing, 2023 As a cutting-edge research direction in the field of radar imaging, video SAR has the capability of high-resolution and persistent imaging at any time and under any weather.
Jiawei Jiang +3 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 +2 more sources
Terahertz multistatic reflection imaging [PDF]
Journal of the Optical Society of America A, 2002 We describe a new imaging method using single-cycle pulses of terahertz (THz) radiation. This technique emulates the data collection and image processing procedures developed for geophysical prospecting and is made possible by the availability of fiber-coupled THz receiver antennas.
Dorney, Timothy D. +3 more
openaire +3 more sources
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
core +1 more source
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
openaire +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
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
THz QCL - Based active imaging applied to composite materials diagnostic [PDF]
, 2010 This paper presents a CW raster-scanning THz imaging setup, used to perform Non-Destructive Testing of Kevlar and carbon fibre samples. The setup uses a 2.5 THz Quantum Cascade Laser as a source.
Yoann Petitjean +9 more
core +1 more source