基于铌酸锂回音壁模式微盘谐振器的太赫兹热光探测器。

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

作者信息

Cosci Alessandro, Cerminara Matteo, Conti Gualtiero Nunzi, Soria Silvia, Righini Giancarlo C, Pelli Stefano

机构信息

Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184 Rome, Italy.

IFAC-CNR, Istituto di Fisica Applicata "Nello Carrara", Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.

出版信息

Sensors (Basel). 2017 Jan 28;17(2):258. doi: 10.3390/s17020258.

DOI:10.3390/s17020258

PMID:28134857

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5336064/

Abstract

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 10⁷, 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.

摘要

本研究分析了铌酸锂回音壁模式微盘谐振器作为太赫兹波段潜在测辐射热计探测器的性能。从理论上通过其热光系数和热系数对该谐振器在稳态下进行了表征。考虑到品质因数为10⁷，评估出最小可探测功率为20 μW，比其噪声等效功率高三个数量级。这一数值开启了将铌酸锂盘式谐振器用作太赫兹波段灵敏室温探测器的可行性。