Results 31 to 40 of about 176,774 (326)

A True Optoelectronic Spectrum Analyzer for Millimeter Waves With Hz Resolution

open access: yesIEEE Access, 2021
We present an architecture for millimeter-wave spectrum analyzers with Hz resolution and precision based on heterodyne down-conversion using ErAs:InGaAs photoconductive mixers driven by a tunable ultra-narrow linewidth continuous-wave (CW) photonic local
Anuar De Jesus Fernandez Olvera   +2 more
doaj   +1 more source

Design of a tunable, room temperature, continuous-wave terahertz source and detector using silicon waveguides [PDF]

open access: yes, 2008
We describe the design of a silicon-based source for radiation in the 0.5-14 THz regime. This new class of devices will permit continuously tunable, milliwatt scale, cw, room temperature operation, a substantial advance over currently available ...
Baehr-Jones, T.   +3 more
core   +1 more source

Effect of Ultraviolet Irradiation on 4H-SiC PiN Diodes Characteristics

open access: yesNanoscale Research Letters, 2021
In this paper, the effect of ultraviolet (UV) irradiation on the static characteristics of high voltage 4H-SiC PiN is investigated. No significant change is observed in the forward on state characteristic of 4H-SiC PiN diodes before and after ultraviolet
Xingliang Xu   +6 more
doaj   +1 more source

Progresses towards the application of terahertz technologies

open access: yesDianzi Jishu Yingyong, 2019
Science and technologies based on terahertz radiation have developed rapidly over the recent decades, which inspires the application attempts and research of terahertz technologies in several fields.
Wu Shuai, Qu Hao, Tu Hao, Feng Hui
doaj   +1 more source

Investigations on Practical Issues in Solid Immersion Lens Based Sub-Wavelength Terahertz Imaging Technique: System Stability Verification and Interference Pattern Removal

open access: yesSensors, 2021
Terahertz (THz) imaging techniques are attractive for a wide range of applications, such as non-destructive testing, biological sensing, and security imaging.
Da-Hye Choi   +3 more
doaj   +1 more source

Direct measurement of molecular mobility and crystallisation of amorphous pharmaceuticals using terahertz spectroscopy. [PDF]

open access: yes, 2016
Despite much effort in the area, no comprehensive understanding of the formation and behaviour of amorphous solids has yet been achieved. This severely limits the industrial application of such materials, including drug delivery where, in principle ...

core   +2 more sources

Nonlinear two-dimensional terahertz photon echo and rotational spectroscopy in the gas phase [PDF]

open access: yes, 2016
Ultrafast two-dimensional spectroscopy utilizes correlated multiple light-matter interactions for retrieving dynamic features that may otherwise be hidden under the linear spectrum.
Fleischer, Sharly   +5 more
core   +2 more sources

Compact Design for Bi-Polarization Quantum Routers on SOI Platform

open access: yesPhotonics, 2023
An ultra-compact optical quantum router (QR) consisting of a Mach–Zehnder interferometer (MZI) and waveguide tapers is proposed and numerically simulated, using silicon-on-insulator (SOI).
Zijie Dai   +5 more
doaj   +1 more source

Intense terahertz laser fields on a two-dimensional electron gas with Rashba spin-orbit coupling

open access: yes, 2004
The spin-dependent density of states and the density of spin polarization of an InAs-based two-dimensional electron gas with the Rashba spin-orbit coupling under an intense terahertz laser field are investigated by utilizing the Floquet states to solve ...
J. L. Cheng, M. W. Wu, Xu J. Z.
core   +1 more source

Detection of incoherent broadband terahertz light using antenna-coupled high-electron-mobility field-effect transistors

open access: yes, 2017
The sensitivity of direct terahertz detectors based on self-mixing of terahertz electromagnetic wave in field-effect transistors is being improved with noise-equivalent power close to that of Schottky-barrier-diode detectors.
Li, Xiang(李想)   +9 more
core   +1 more source

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