Results 251 to 260 of about 54,131 (291)

Explosives characterization in terahertz range

SPIE Proceedings, 2011
A Thz spectral characterization of the behaviour of different explosives is presented in this paper. This characterization will be done in the frequency range from 20 GHz to 4 THz using a Teraview Spectra 3000. This system has a capacity of measuring from 20 GHz to 4 THz fed by a laser source. With the Teraview Spectra 3000 equipment will be possible
I. Maestrojuán, I. Palacios, D. Etayo, J. C. Iriarte, J. Teniente, I. Ederra, R. Gonzalo   +6 more
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Terahertz Radar with High Resolution Range Profile

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2021
In this paper, the performance of terahertz (THz) radar based on high resolution range profile (HRRP) is described. This terahertz radar, developed for the high resolution imaging under the complex environment such as sand-dust weather and so on, operates at 230GHz over multiple GHz of bandwidth.
Jialin Mei, Zhaoyang Li, Chong Yi, Jingshui Zhang, Yupeng Wang, Mingyuan Sun   +5 more
openaire   +1 more source

Terahertz frequency range band-stop filters

Applied Physics Letters, 2005
We report the operation of band-stop filters in the terahertz (THz) frequency range, working at a center frequency of 600GHz. The filters were characterized by embedding them in a microstrip line attached to photoconductive switches which act as THz emitters and detectors. The filters have applications in sensing and detection. The chosen filter design
J. Cunningham, C. Wood, A. G. Davies, I. Hunter, E. H. Linfield, H. E. Beere   +5 more
openaire   +1 more source

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
openaire   +1 more source

Spectral Holograms in the Terahertz Range

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1996
Abstract We review recent works on temporal frequency holograms. The role of white light excitation is stressed. The interferometric data retrieval technique is emphasized. Both the photorefractive crystals and the persistent spectral hole burning amorphous materials are considered as spectral holography media.
J.-L. Le. Gouët, F. Grelet, I. Lorgere, M. Rätsep, M. Tian, M.-L. Roblin, C. Sigel   +6 more
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Wireless Communication Systems of Terahertz Frequency Range

2021
One of the trends in the development of modern wireless systems is the application of the terahertz frequency range. The terahertz range occupies an intermediate position between the well-studied microwave and optical ranges of the electromagnetic radiation spectrum.
M. Ilchenko, T. Narytnyk, G. Avdeyenko
openaire   +1 more source

Tunnelling through the terahertz range

Physics World, 1997
When semiconductor nanostructures are subjected to a strong high-frequency radiation field, they exhibit a type of quantum transport known as photon-assisted tunnelling. The radiation helps the electrons to tunnel between two regions of the semiconductor that are separated by a small barrier, leading to increased current flow.
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Obtaining terahertz-range metamaterials by laser engraving

Journal of Optical Technology, 2012
This paper discusses the results of forming lattices of resonance and polarizing planar elements—metamaterials that serve the function of band-pass filters and polarizers of the terahertz range of wavelengths, made by the direct laser engraving of a metallized polymeric film.
M. M. Nazarov, V. K. Balya, I. Yu. Denisyuk, A. Yu. Ryabov, A. P. Shkurinov   +4 more
openaire   +1 more source

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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Multiple-Band Metamaterial Absorbers of Terahertz Range

2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE), 2018
The paper is concerned with a three constructions of multiple-band metamaterial absorbers of terahertz (THz) range. In this paper, an absorber with two nested split ring resonators (SRRs) is introduced that its absorption spectrum has three absorption peaks by the values of 99,8%, 97,52%, and 94,98% at the frequencies of 8,5; 14,7 and 23,9 THz ...
M.A. Medvedev, A.S. Oleynik
openaire   +1 more source