THz Pyro-Optical Detector Based on LiNbO3 Whispering Gallery Mode Microdisc Resonator

Alessandro Cosci, Matteo Cerminara, Gualtiero Conti, Silvia Soria, Giancarlo Righini, Stefano Pelli
2017 Sensors  
This study analyzes the capabilities of a LiNbO3 whispering gallery mode microdisc resonator as a potential bolometer detector in the THz range. The resonator is theoretically characterized in the stationary regime by its thermo-optic and thermal coefficients. Considering a Q-factor of 10 7 , a minimum detectable power of 20 μW was evaluated, three orders of magnitude above its noise equivalent power. This value opens up the feasibility of exploiting LiNbO3 disc resonators as sensitive room-temperature detectors in the THz range.
doi:10.3390/s17020258 pmid:28134857 pmcid:PMC5336064 fatcat:qbiqws6yafe7pc2qwmio5aanv4