Temperature Effects in an Acousto-Optic Modulator of Terahertz Radiation Based on Liquefied SF(6) Gas

The acousto-optic (AO) diffraction of terahertz (THz) radiation in liquefied sulfur hexafluoride (SF [Formula: see text]) was investigated in various temperature regimes. It was found that with the increase in the temperature from +10 to +23 [Formula: see text] C, the efficiency of the AO diffractio...

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Detalles Bibliográficos
Autores principales: Nikitin, Pavel A., Gerasimov, Vasily V., Khasanov, Ildus S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8509753/
https://www.ncbi.nlm.nih.gov/pubmed/34639915
http://dx.doi.org/10.3390/ma14195519
Descripción
Sumario:The acousto-optic (AO) diffraction of terahertz (THz) radiation in liquefied sulfur hexafluoride (SF [Formula: see text]) was investigated in various temperature regimes. It was found that with the increase in the temperature from +10 to +23 [Formula: see text] C, the efficiency of the AO diffraction became one order higher at the same amplitude of the driving electrical signal. At the same time, the efficiency of the AO diffraction per 1 W of the sound power as well as the angular bandwidth of the efficient AO interaction were temperature independent within the measurement error. Increase of the resonant sound frequency with decreasing temperature and strong narrowing of the sound frequency bandwidth of the efficient AO interaction were detected.

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