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High-temperature terahertz intrawaveguide spectroscopy using hollow-core sapphire photonic crystal waveguide
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Paper Abstract

An ability to use sapphire hollow-core terahertz (THz) waveguides for high-temperature intrawaveguide spectroscopy was studied experimentally. We assembled an experimental setup, which employs the principles of THz intrawaveguide spectroscopy and uses a backward wave oscillator, as a continuous-wave THz source with tunable output frequency, and a Golay cell, as a detector of THz wave intensity. In this setup, the sapphire shaped crystal serves simultaneously as an optical waveguide and as a sample cuvette; the analyte is placed in its central hollow channel. We applied the setup for high-temperature measurements of sodium nitrite (NaNO2) powder. The observed results demonstrate an ability to sense melting of NaNO2-powder; justifying a prospect of sapphire waveguides in THz measurements in harsh environments, at high temperatures and pressures.

Paper Details

Date Published: 3 June 2019
PDF: 6 pages
Proc. SPIE 11065, Saratov Fall Meeting 2018: Optical and Nano-Technologies for Biology and Medicine, 110651E (3 June 2019); doi: 10.1117/12.2526292
Show Author Affiliations
Gleb M. Katyba, Institute of Solid State Physics (Russian Federation)
Prokhorov General Physics Institute (Russian Federation)
Bauman Moscow State Technical Univ. (Russian Federation)
Vladimir N. Kurlov, Institute of Solid State Physics (Russian Federation)
Kirill I. Zaytsev, Prokhorov General Physics Institute (Russian Federation)
Bauman Moscow State Technical Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 11065:
Saratov Fall Meeting 2018: Optical and Nano-Technologies for Biology and Medicine
Elina A. Genina; Valery V. Tuchin, Editor(s)

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