Investigation of a GaN-Based SAW Oscillator with respect to UV Illumination and Temperature
R. Miškinis a, D. Jokubauskis a, E. Urbaa, D. Smirnov a, L. Gaidamovičiūtė a, K. Mikalauskas a, A. Sereika b, R. Rimeika b, D. Čiplys b
aMetrology Department, Center for Physical Sciences and Technology, A. Goštauto st. 11, LT-01108, Vilnius, Lithuania
bRadiophysics Department, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, bldg. III, LT-10222, Vilnius, Lithuania
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Oscillation frequency of a GaN-based surface acoustic wave delay-line oscillator is investigated in the temperature range from -20°C to +38°C, with and without UV illumination. The results imply that such an oscillator may be used for temperature sensing with the resolution of up to 1 mK. On the other hand, as the frequency downshift due to UV illumination does not exhibit a significant dependence on temperature, it may be expected that such a system, when used as a UV sensor, would not require applying a correction for temperature.

DOI: 10.12693/APhysPolA.127.90
PACS numbers: 43.35.+d