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Prospects of designing gold-nanoparticles-based soft terahertz radiation sources and terahertz-to-infrared converters for concealed object detection technology
Author(s): K. A. Moldosanov; A. V. Postnikov; V. M. Lelevkin; N. J. Kairyev
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Paper Abstract

The two-phonon scheme of generation of terahertz (THz) photons by gold nanobars (GNBs) is considered. It is shown that in GNBs, by choosing their sizes, it is possible to provide conditions for converting the energy of longitudinal phonons with THz frequencies into the energy of THz photons. The prospects of designing GNBsbased soft THz radiation sources (frequencies: 0.14; 0.24; 0.41 and 0.70 THz) with a large flow cross-section (diameter ∼ 40 cm) intended for detection of hidden objects under clothing to ensure security in public places (airports, railway stations, stadiums, etc.) are assessed. The choice of the above frequencies is a compromise between the requirements of low absorption of THz radiation by water vapor in air, good penetration through the fabric of clothing, favoring a sufficient resolution of the imaging system, and an abundance of corresponding longitudinal phonons, capable of exciting Fermi electrons in GNBs. Estimates of the characteristics of the terahertz-to-infrared converter based on gold nanospheres (GNSs), which could work in tandem with these sources of THz radiation – as a means of visualization of hidden objects – are also given.

Paper Details

Date Published: 18 October 2019
PDF: 15 pages
Proc. SPIE 11164, Millimetre Wave and Terahertz Sensors and Technology XII, 111640B (18 October 2019); doi: 10.1117/12.2532568
Show Author Affiliations
K. A. Moldosanov, Kyrgyz-Russian Slavic Univ. (Kyrgyzstan)
A. V. Postnikov, LCP-A2MC, Univ. Lorraine (France)
V. M. Lelevkin, Kyrgyz-Russian Slavic Univ. (Kyrgyzstan)
N. J. Kairyev, Kyrgyz-Russian Slavic Univ. (Kyrgyzstan)


Published in SPIE Proceedings Vol. 11164:
Millimetre Wave and Terahertz Sensors and Technology XII
Neil A. Salmon; Frank Gumbmann, Editor(s)

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