Results 21 to 30 of about 1,339,901 (286)

Metasurface-based terahertz wideband linear polarization converter

open access: yesResults in Optics, 2023
We designed a linear polarization converter based on metasurface and simulated its functionality. It has a broad bandwidth and operates in the terahertz frequency range (0.4–1.2 THz).
Yuhan Zhao   +4 more
doaj   +1 more source

On-chip THz studies of low-dimensional semiconductor systems [PDF]

open access: yes, 2013
A wide range of novel on-chip integration techniques were developed to explore the low-temperature perturbation of GaAs/AlGaAs based confined electron systems at terahertz frequencies.
Mistry, Divyang Kishore
core   +6 more sources

Application of terahertz spectroscopy to the characterization of biological samples using birefringence silicon grating [PDF]

open access: yes, 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

High-Frequency Modulation Spectroscopy with a THz Quantum-Cascade Laser [PDF]

open access: yes, 2013
A terahertz absorption spectrometer with a quantum-cascade laser (QCL) for high-resolution molecular spectroscopy is realized. The spectrometer is based on highfrequency (up to 50 MHz) modulation of the QCL frequency.
H.-W. Hubers   +11 more
core   +1 more source

Intracavity terahertz optical parametric oscillators [PDF]

open access: yes, 2011
This thesis describes the design and implementation of several novel, nanosecond pulsed, intracavity optical parametric oscillators for the generation of terahertz radiation.
Walsh, David A.
core   +2 more sources

Molecular spectroscopy with a multimode THz quantum-cascade laser [PDF]

open access: yes, 2011
A terahertz absorption spectrometer for highresolution molecular spectroscopy is realized. The spectrometer is based on a multimode quantum-cascade laser. The design and performance of the spectrometer are presented.
A. D. Semenov   +19 more
core   +1 more source

Electromagnetic Design of Dual Resonant Structures for Improved Sensitivity of Terahertz Label Free Bio-Sensing [PDF]

open access: yes, 2010
A design is proposed exploiting full wave numerical simulation of a dual resonant structure with an aim to sense small amounts of chemical and biochemical materials. The structure is energized with free space radiation in the terahertz regime.
Mihai D. Rotaru   +3 more
core   +2 more sources

Biochar as a low-cost, eco-friendly, and electrically conductive material for terahertz applications

open access: yesScientific Reports, 2021
We investigate conducting characteristics of biochar derived from the pyrolysis of a paper at terahertz frequencies. Paper is annealed under temperatures ranging from 600 to 1000 °C to modify structural and electrical properties.
Woongkyu Park   +5 more
doaj   +1 more source

Lipids monitoring in Scenedesmus obliquus based on terahertz technology

open access: yesBiotechnology for Biofuels, 2020
Background Microalgae are considered as a source of low pollution and renewable fuel due to their ability to synthesize an abundance of lipids.
Yongni Shao   +6 more
doaj   +1 more source

An introduction to terahertz time-domain spectroscopic ellipsometry

open access: yesAPL Photonics, 2022
In the past, terahertz spectroscopy has mainly been performed based on terahertz time-domain spectroscopy systems in a transmission or a window/prism-supported reflection configuration.
X. Chen, E. Pickwell-MacPherson
doaj   +1 more source

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