Non-Hermitian Physics and Exceptional Points in High-Quality Optical Microresonators

Ultra-High-Q Optical Microcavities, pp. 269-313 (2020) No AccessChapter 8: Non-Hermitian Physics and Exceptional Points in High-Quality Optical MicroresonatorsWeijian Chen, Changqing Wang, Bo Peng, and Lan YangWeijian ChenDepartment of Electrical and Systems Engineering, Washington University, Saint Louis, MO, 63130, USADepartment of Physics, Washington University, Saint Louis, MO, 63130, USA, Changqing WangDepartment of Electrical and Systems Engineering, Washington University, Saint Louis, MO, 63130, USA, Bo PengGlobalfoundries, East Fishkill, NY, 12533, USA, and Lan YangDepartment of Electrical and Systems Engineering, Washington University, Saint Louis, MO, 63130, USAhttps://doi.org/10.1142/9789814566070_0008Cited by:1 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: High-quality optical microresonators that can significantly enhance light–matter interaction have found broad applications in many fields including optical communications, microlasers, optical sensing, optomechanics, frequency combs and cavity quantum electrodynamics. Recently, they have become an excellent platform to study non-Hermitian physics and exceptional points by judiciously tailoring modal coupling and gain–loss distribution. Typical configurations include two or more coupled optical resonators, hybrid resonator–scatterer systems, and a single resonator with complex index modulation. In this chapter, we summarize the recent progress of non-Hermitian optical microresonators especially parity-time symmetric microcavities with balanced gain and loss and their applications in light transport, laser mode management, optical sensing, and optomechanics. These studies not only unveil the intriguing features associated with non-Hermitian physics and exceptional points but also provide new degrees of freedom to design optical systems with novel functionalities. FiguresReferencesRelatedDetailsCited By 1Coherent perfect absorption at an exceptional pointChangqing Wang, William R. Sweeney, A. Douglas Stone and Lan Yang10 Sep 2021 | Science, Vol. 373, No. 6560 Ultra-High-Q Optical MicrocavitiesMetrics History PDF download