Journal ArticleDOI
Terahertz time-domain spectroscopy of water vapor.
TLDR
By analyzing the propagation of terahertz electromagnetic pulses through water vapor, this work has made what it is believed are the most accurate measurements to date of the absorption cross sections of the water molecule for the nine strongest lines.Abstract:
We describe the application of a new high-brightness, terahertz-beam system to time-domain spectroscopy. By analyzing the propagation of terahertz electromagnetic pulses through water vapor, we have made what we believe are the most accurate measurements to date of the absorption cross sections of the water molecule for the nine strongest lines in the frequency range from 0.2 to 1.45 THz.read more
Citations
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Journal ArticleDOI
Materials for terahertz science and technology
Bradley Ferguson,Xi-Cheng Zhang +1 more
TL;DR: Terahertz spectroscopy and imaging provide a powerful tool for the characterization of a broad range of materials, including semiconductors and biomolecules, as well as novel, higher-power terahertz sources.
Journal ArticleDOI
Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors
TL;DR: In this paper, the authors measured the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the semiconductors silicon, gallium arsenide, and germanium.
Journal ArticleDOI
Terahertz spectroscopy and imaging – Modern techniques and applications
TL;DR: The terahertz time-domain spectroscopy (THz-TDS) as discussed by the authors is a new spectroscopic technique based on coherent and time-resolved detection of the electric field of ultrashort radiation bursts.
Journal ArticleDOI
Imaging with terahertz radiation
TL;DR: A comprehensive review of the various techniques used for terahertz image formation can be found in this paper, as well as numerous examples which illustrate the many exciting potential uses for these emerging technologies.
Journal ArticleDOI
T-ray imaging
TL;DR: In this paper, the authors describe the technology necessary to perform terahertz "T-ray" imaging, novel imaging techniques, and commercial applications of T-ray imaging.
References
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Journal ArticleDOI
Subpicosecond photoconducting dipole antennas
TL;DR: In this article, photoconducting antennas have been demonstrated which are capable of generating and coherently detecting subpicosecond electrical pulses, when illuminated with femtosecond optical pulses, radiate electrical pulses which have frequency spectra that extend from 2 THz.
Journal ArticleDOI
An updated model for millimeter wave propagation in moist air
TL;DR: In this article, a practical atmospheric millimeter-wave propagation model (MPM) is proposed to predict attenuation for dry air at 2.5-430 GHz. But the model is limited to frequencies below 300 GHz and the number of spectroscopic parameters can be reduced to less than 200.
Journal ArticleDOI
High‐brightness terahertz beams characterized with an ultrafast detector
TL;DR: In this paper, a dipolar antenna structure was proposed to improve the emission and detection of electromagnetic beams of single-cycle 0.5 THz pulses, and the frequency response was extended to well beyond 1 THz and the beam power was increased by 15 times.
Journal ArticleDOI
Point source terahertz optics
TL;DR: In this paper, an ultrafast 10 μm-sized, electric dipole source of terahertz radiation was demonstrated, which was coupled to a 1 cm spherical mirror.
Journal ArticleDOI
Calculation of Line Widths in H2O‐N2 Collisions
W. S. Benedict,L. D. Kaplan +1 more
TL;DR: In this paper, Anderson's general theory of collision line broadening has been applied to H2O•N2 encounters, where the only attractive force was assumed to be that between the H 2O dipole and the N2 quadrupole, qN2, an adjustable parameter.