title: Demonstration of chalcogenide glass racetrack microresonators.
abstract: 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 As(2)S(3) films. The device simultaneously features a small footprint of 0.012 mm x 0.012 mm, a cavity Q (quality factor) of 10,000, and an extinction ratio of 32 dB. These resonators exhibit a very high sensitivity to refractive index changes with a demonstrated detection capability of Dn(As(2)S(3)=(4.5 x 10(-6)+/-10%) refractive index unit. The resonators were applied to derive a photorefractive response of As(2)S(3) to lambda=550 nm light. The resonator devices are a versatile platform for both sensing and glass material property investigation.
authors.affiliation: Microphotonics Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. hujuejun@mit.edu
authors.forename: Juejun
authors.initials: J
authors.lastname: Hu
authors.forename: Nathan
authors.initials: N
authors.lastname: Carlie
authors.forename: Laeticia
authors.initials: L
authors.lastname: Petit
authors.forename: Anu
authors.initials: A
authors.lastname: Agarwal
authors.forename: Kathleen
authors.initials: K
authors.lastname: Richardson
authors.forename: Lionel
authors.initials: L
authors.lastname: Kimerling