title: High Q factor chalcogenide ring resonators for cavity-enhanced MIR spectroscopic sensing.
abstract: 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 Ge11.5As24Se64.5 core 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.
authors.forename: Pan
authors.initials: P
authors.lastname: Ma
authors.forename: Duk-Yong
authors.initials: DY
authors.lastname: Choi
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Yang
authors.forename: Khu
authors.initials: K
authors.lastname: Vu
authors.forename: Thach
authors.initials: T
authors.lastname: Nguyen
authors.forename: Arnan
authors.initials: A
authors.lastname: Mitchell
authors.forename: Barry
authors.initials: B
authors.lastname: Luther-Davies
authors.forename: Steve
authors.initials: S
authors.lastname: Madden