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Ultrahigh-Q chalcogenide micro-racetrack resonators
Bright Lu, James W. Erikson, Bo Xu, Sinica Guo, Mo Zohrabi, Juliet T. Gopinath, Wounjhang Park
https://arxiv.org/abs/2510.07688

Ultrahigh-Q chalcogenide micro-racetrack resonators
High-quality factor microresonators are an attractive platform for the study of nonlinear photonics, with diverse applications in communications, sensing, and quantum metrology. The characterization of loss mechanisms and nonlinear properties in a microresonator is a necessity for the development of photonic integrated circuits. Here, we demonstrate a high-quality chalcogenide ($Ge_{23}Sb_{7}S_{70}$) micro-racetrack resonator utilizing Euler curves. The racetrack geometry is studied to minimize…