| Records |
| Author |
Gorokhov, G.; Bychanok, D.; Gayduchenko, I.; Rogov, Y.; Zhukova, E.; Zhukov, S.; Kadyrov, L.; Fedorov, G.; Ivanov, E.; Kotsilkova, R.; Macutkevic, J.; Kuzhir, P. |
| Title |
THz spectroscopy as a versatile tool for filler distribution diagnostics in polymer nanocomposites |
Type |
Journal Article |
| Year |
2020 |
Publication |
Polymers (Basel) |
Abbreviated Journal  |
Polymers (Basel) |
| Volume |
12 |
Issue |
12 |
Pages |
3037 (1 to 14) |
| Keywords |
THz spectroscopy; nanocomposites, percolation threshold, time-domain spectroscopy, time-domain spectrometer, TDS |
| Abstract |
Polymer composites containing nanocarbon fillers are under intensive investigation worldwide due to their remarkable electromagnetic properties distinguished not only by components as such, but the distribution and interaction of the fillers inside the polymer matrix. The theory herein reveals that a particular effect connected with the homogeneity of a composite manifests itself in the terahertz range. Transmission time-domain terahertz spectroscopy was applied to the investigation of nanocomposites obtained by co-extrusion of PLA polymer with additions of graphene nanoplatelets and multi-walled carbon nanotubes. The THz peak of permittivity's imaginary part predicted by the applied model was experimentally shown for GNP-containing composites both below and above the percolation threshold. The physical nature of the peak was explained by the impact on filler particles excluded from the percolation network due to the peculiarities of filler distribution. Terahertz spectroscopy as a versatile instrument of filler distribution diagnostics is discussed. |
| Address |
Institute of Photonics, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland |
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| Language |
English |
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| ISSN |
2073-4360 |
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| Notes |
PMID:33353036; PMCID:PMC7767186 |
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no |
| Call Number |
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Serial |
1780 |
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| Author |
Gershenzon, E. M.; Gogidze, I. G.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
| Title |
Picosecond response on optical-range emission in thin YBaCuO films |
Type |
Journal Article |
| Year |
1991 |
Publication |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
Abbreviated Journal |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
| Volume |
17 |
Issue |
22 |
Pages |
6-10 |
| Keywords |
YBCO HTS detectors |
| Abstract |
Целью настоящей работы является целенаправленный поиск пико-секундного отклика на оптическое излучение выяснение оптимальных условий его наблюдения, а также сравнение характеристик неравновесных эффектов в оптическом и субмиллиметровом диапазонах. |
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| Language |
Russian |
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no |
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1684 |
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| Author |
Aksaev, E. E.; Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
| Title |
Prospects for using high-temperature superconductors to create electron bolometers |
Type |
Journal Article |
| Year |
1989 |
Publication |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
Abbreviated Journal |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
| Volume |
15 |
Issue |
14 |
Pages |
88-93 |
| Keywords |
HTS HEB |
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Russian |
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| ISSN |
0320-0116 |
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| Notes |
Перспективы применения высокотемпературных сверхпроводников для создания электронных болометров |
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no |
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Serial |
1693 |
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| Author |
Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Karasik, B. S.; Lyulkin, A. M.; Semenov, A. D. |
| Title |
Fast-response superconducting electron bolometer |
Type |
Journal Article |
| Year |
1989 |
Publication |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
Abbreviated Journal |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
| Volume |
15 |
Issue |
3 |
Pages |
88-92 |
| Keywords |
Nb HEB |
| Abstract |
The general design, operation, and performance characteristics of fast-response electronic bolometers using a thin superconducting Nb film on a leucosapphire substrate are briefly reviewed. The volt-watt sensitivity of the bolometrs is 2,000-200,000 V/W, the operating temperature is 1.6 K, and the time constant is 4-4.5 ns. |
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Russian |
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no |
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Serial |
1694 |
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| Author |
Bakhvalova, T.; Belkin, M. E.; Kovalyuk, V. V.; Prokhodtcov, A. I.; Goltsman, G. N.; Sigov, A. S. |
| Title |
Studying key principles for design and fabrication of silicon photonic-based beamforming networks |
Type |
Conference Article |
| Year |
2019 |
Publication |
PIERS-Spring |
Abbreviated Journal |
PIERS-Spring |
| Volume |
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Issue |
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Pages |
745-751 |
| Keywords |
silicon photonics, TriPleX platform |
| Abstract |
In the paper, we address key principles for computer-aided design and fabrication of silicon-photonics-based optical beamforming network selecting the optimal approach by simulation and experimental results. To clarify the consideration, the study is conducted on the example of a widely used binary switchable silicon-nitride optical beamforming network based on TriPleX platform. Comparison of simulation results and experimental studies of the prototype shows that the relative error due to technological imperfections does not exceed 3%. According to the estimation, such an error introduces insignificant distortion in the radiation pattern of the referred antenna array. |
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no |
| Call Number |
9017646 |
Serial |
1186 |
| Permanent link to this record |
