Optimization of the sensitivity of a temperature sensor based on germanium-vacancy color center (GeV) in diamond

Autor: Cojocaru, I. S., Soshenko, V. V., Bolshedvorskii, S. V., Davydov, V. A., Kulikova, L. F., Agafonov, V. N., Chernyavskiy, A., Smolyaninov, A. N., Sorokin, V. N., Kilin, S. Ya., Akimov, A. V.
Rok vydání: 2024
Předmět:
Druh dokumentu: Working Paper
Popis: Temperature sensors based on GeV color center in diamond are attracting a lot of attention in both science and industry. The industrial adoption of these sensors nevertheless, requires the simplest and cheapest possible design for the sensing element. The original sensor design was based on the measurement of the spectral characteristics of the zero-phonon line. Recently, a modification of this method has been proposed utilizing splitting the GeV emission with a dichroic mirror and determining on temperature from the ratio of two resulting signals. In this analysis, we compare both methods in detail. For measurements near room temperature, both methods have comparable behavior, slightly depended on quality of components used. However, for optimal parameters of a filter at temperatures of about 300 {\deg}C, the new method already outperforms the original by about a factor of 2. Moreover, the sensitivity of the new method remains approximately consistent with that observed at room temperature.
Databáze: arXiv