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Sensors 2017, 17(2), 258;

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

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
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via della Faggiola 32, 56126 Pisa, Italy
Author to whom correspondence should be addressed.
Academic Editor: A. G. Unil Perera
Received: 7 December 2016 / Revised: 16 January 2017 / Accepted: 24 January 2017 / Published: 28 January 2017
(This article belongs to the Special Issue Infrared Detectors)
Full-Text   |   PDF [1690 KB, uploaded 10 February 2017]   |  


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. View Full-Text
Keywords: bolometer; THz; WGM; microdisc; LiNbO3 bolometer; THz; WGM; microdisc; LiNbO3

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Cosci, A.; Cerminara, M.; Conti, G.N.; Soria, S.; Righini, G.C.; Pelli, S. THz Pyro-Optical Detector Based on LiNbO3 Whispering Gallery Mode Microdisc Resonator. Sensors 2017, 17, 258.

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