Results 301 to 310 of about 56,977 (335)

Nanostructures in the Terahertz Range

2014
With advances in technology, terahertz imaging and spectroscopy are beginning to move out of the laboratory and find applications in areas as diverse as security screening, medicine, art conservation and field archaeology. Nevertheless, there is still a need to improve upon the performance of existing terahertz systems to achieve greater compactness ...
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The Talbot effect in the terahertz spectral range

35th International Conference on Infrared, Millimeter, and Terahertz Waves, 2010
The Talbot effect in the terahertz spectral range has been first observed and used in metrology applications: measurement of distance, determination of radiation wavelength, and real-time detection of wavefront distortion.
Boris A. Knyazev, Valery S. Cherkassky, Yulia Yu. Choporova, Vasily V. Gerasimov, Maxim G. Vlasenko   +4 more
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Spectroscopy of Photonic Molecules in the Terahertz Range

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
We present photonic molecules in the terahertz range. Two dielectric whispering gallery mode resonators with matched resonance spectra are coupled over tens of resonances. Frequency splitting of multiple modes is observed in excellent agreement with theory.
H. G. L. Schwefel, S. Preu, S. Malzer, G. H. Döhler, L. J. Wang   +4 more
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Investigation of metamaterials for terahertz frequency range

SPIE Proceedings, 2011
Metamaterials are artificial materials with unusual properties that do not exist in nature and basically could consist of subwavelength metallic patterns printed on dielectric substrate. In this paper, we present a theoretical and experimental investigations of metamaterials designed for THz applications.
Yahiaoui, R., Nemec, H., Kuzel, P., Kadlec, F., Kadlec, C., Schilling, J., Bari, M., Delagnes, J. C., Mounaix, P.   +8 more
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Terahertz-range quantum well photodetector

SPIE Proceedings, 2005
We have designed and fabricated GaAs/AlGaAs QWIP photodetector for THz range of spectrum (3THz, 100 μm). To evaluate suitability of this type of detector for real-time THz imaging, a prototype of a small array have been built by integrating detector elements with cryogenic readout electronics.
M. Patrashin, I. Hosako, P. Merken
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Chirp-Pulse Terahertz Range Profiling

2007
Abstract : Terahertz (THz) range profiling is investigated for several cm-size metal targets. Aperiodically-poled lithium niobate crystals are used to generate a chirp-pulse THz signal, which is used to probe several targets. The reflected waveforms from different targets show distinctive features that permit differentiation of the targets.
X.-C. Zhang, Jeffrey M. Warrender, Wei Lang   +2 more
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Terahertz range profile of the tilted-plate

SPIE Proceedings, 2017
The range profile is studied first in the microwave band. With the advent of the terahertz radar technology, the range profile is studied from microwave band to the terahertz band, which is the terahertz range profile (TRP). The outstanding feature of TRP is that it can obtain the 3-D shape and the range information of the target by one ultra-short ...
Yanhui Li, Zhensen Wu, Lu Bai
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Single-Photon Detectors in the Terahertz Range

IEEE Journal of Selected Topics in Quantum Electronics, 2011
Semiconductor quantum dot detectors as well as semiconductor charge-sensitive infrared phototransistors are described. They are the only detectors that can count single photons in the terahertz region at present. In terms of the noise equivalent power (NEP), the detectors realize experimental values on the order of 10-21 W/Hz1/2, while theoretically ...
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A RECEIVING MODULE FOR A TERAHERTZ RANGE RECEIVER

P R O C E E D I N G S OF NATIONAL POLYTECHNIC UNIVERSITY OF ARMENIA INFORMATION TECHNOLOGIES, ELECTRONICS, RADIO ENGINEERING
Recently, electromagnetic radiation in the terahertz range has attracted increasing attention of scientists in the fields of radiophysics, satellite communication systems, unmanned vehicle development, radar, and related fields. Practical exploitation of this range could provide a powerful impetus to scientific research in a wide range of fields, such ...
M.Ts. Ayvazyan, V.A. Vardanyan
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CHIRAL METAMATERIAL ABSORBERS OF THE TERAHERTZ RANGE

Infokommunikacionnye tehnologii
The absorption effect in chiral metamaterials is associated with their unique electromagnetic properties, which are determined by the mirror asymmetry of their microstructure. These materials exhibit unusual interactions with optical waves, including controlled absorption, cross-polarization, and frequency selectivity.
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