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

Gleb M. Katyba; Vladimir N. Kurlov; Kirill I. Zaytsev

doi:10.1117/12.2526292

3 June 2019 High-temperature terahertz intrawaveguide spectroscopy using hollow-core sapphire photonic crystal waveguide

Gleb M. Katyba, Vladimir N. Kurlov, Kirill I. Zaytsev

Author Affiliations +

Proceedings Volume 11065, Saratov Fall Meeting 2018: Optical and Nano-Technologies for Biology and Medicine; 110651E (2019) https://doi.org/10.1117/12.2526292
Event: International Symposium on Optics and Biophotonics VI: Saratov Fall Meeting 2018, 2018, Saratov, Russian Federation

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.

Citation Download Citation

Gleb M. Katyba, Vladimir N. Kurlov, and Kirill I. Zaytsev "High-temperature terahertz intrawaveguide spectroscopy using hollow-core sapphire photonic crystal waveguide", Proc. SPIE 11065, Saratov Fall Meeting 2018: Optical and Nano-Technologies for Biology and Medicine, 110651E (3 June 2019); https://doi.org/10.1117/12.2526292

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