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High Q factor chalcogenide ring resonators for cavity-enhanced MIR spectroscopic sensing

Ma, Pan; Yu, Yi; Yang, Zhiyong; Vu, Khu; Nguyen, Thach; Mitchell, A.; Luther-Davies, Barry; Madden, Steve; Choi, Duk-Yong


We report the characteristics of high Q factor chalcogenide ring resonators designed for sensing in the mid-infrared (MIR). The resonators consisted of an exposed Ge11.5As24Se64.5core on a Ge11.5As24S64.5 bottom cladding and were fabricated in the racetrack coupled ring structure. Loaded Q factors at 5.2μm up to 58,000were obtained, corresponding to an intrinsic Q of 145,000 and a waveguide propagation loss of 0.84dB/cm.

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Optics Express
DOI: 10.1364/OE.23.019969
Access Rights: Open Access


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