Borisov Evgenii V, Kalinichev Alexey A, Kolesnikov Ilya E
Center for Optical and Laser Materials Research, St. Petersburg University, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia.
Materials (Basel). 2023 Feb 3;16(3):1311. doi: 10.3390/ma16031311.
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 = 3.82% K and Δ = 0.12 K at = 50 K. The synergy between multiple linear regression and multiparametric thermal sensing demonstrated for Raman-based thermometry results in a ten-fold improvement of and a two-fold enhancement of Δ. All studies performed testify that the ZnTe crystal is a promising multimode contactless optical sensor for cryogenic thermometry.
在本研究中，碲化锌（ZnTe）晶体被用于为低温温度提供精确的热传感。采用了多种技术，即拉曼光谱和光致发光光谱，以拓宽工作温度范围并提高所提出温度计的可靠性。基于拉曼的温度传感可应用于20 - 100 K的范围，而基于发光的温度测量可在更窄的20 - 70 K范围内使用。然而，后一种策略提供了更好的相对热灵敏度和温度分辨率。基于单个温度相关参数的最佳热性能在T = 50 K时达到α = 3.82% K和ΔT = 0.12 K。基于拉曼的温度测量所展示的多元线性回归与多参数热传感之间的协同作用，使α提高了十倍，ΔT增强了两倍。所有进行的研究都证明，碲化锌晶体是一种用于低温温度测量的有前途的多模非接触式光学传感器。
