ZnTe Crystal Multimode Cryogenic Thermometry Using Raman and Luminescence Spectroscopy.

Autor: Borisov EV; Center for Optical and Laser Materials Research, St. Petersburg University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia., Kalinichev AA; Center for Optical and Laser Materials Research, St. Petersburg University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia., Kolesnikov IE; Center for Optical and Laser Materials Research, St. Petersburg University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2023 Feb 03; Vol. 16 (3). Date of Electronic Publication: 2023 Feb 03.
DOI: 10.3390/ma16031311
Abstrakt: In this study, ZnTe crystal was applied to provide precise thermal sensing for cryogenic temperatures. Multiple techniques, namely Raman and photoluminescence spectroscopies, were used to broaden the operating temperature range and improve the reliability of the proposed thermometers. Raman-based temperature sensing could be applied in the range of 20-100 K, while luminescence-based thermometry could be utilized in a narrower range of 20-70 K. However, the latter strategy provides better relative thermal sensitivity and temperature resolution. The best thermal performances based on a single temperature-dependent parameter attain S r = 3.82% K -1 and Δ T = 0.12 K at T = 50 K. The synergy between multiple linear regression and multiparametric thermal sensing demonstrated for Raman-based thermometry results in a ten-fold improvement of Sr and a two-fold enhancement of Δ T . All studies performed testify that the ZnTe crystal is a promising multimode contactless optical sensor for cryogenic thermometry.
Databáze: MEDLINE
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