We have demonstrated what we believe to be the first chalcogenide glass racetrack microresonator using a complementary metal-oxide semiconductor-compatible lift-off technique with thermally evaporated films. The device simultaneously features a small footprint of , a cavity Q (quality factor) of 10,000, and an extinction ratio of . These resonators exhibit a very high sensitivity to refractive index changes with a demonstrated detection capability of refractive index unit. The resonators were applied to derive a photorefractive response of to light. The resonator devices are a versatile platform for both sensing and glass material property investigation.
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