
1.Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2.State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, China
Feng Li (felix831204@xjtu.edu.cn)
Published:30 November 2022,
Published Online:25 October 2022,
Received:06 September 2022,
Revised:30 September 2022,
Accepted:08 October 2022
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Wang, Y. S. et al. Manipulating cavity photon dynamics by topologically curved space. Light: Science & Applications, 11, 2738-2747 (2022).
Wang, Y. S. et al. Manipulating cavity photon dynamics by topologically curved space. Light: Science & Applications, 11, 2738-2747 (2022). DOI: 10.1038/s41377-022-01009-x.
Asymmetric microcavities supporting Whispering-gallery modes (WGMs) are of great significance for on-chip optical information processing. We establish asymmetric microcavities on topologically curved surfaces
where the geodesic light trajectories completely reconstruct the cavity mode features. The curvature-mediated photon-lifetime engineering enables the enhancement of the quality factors of periodic island modes by up to 200 times. Strong and weak coupling between modes of very different origins occurs when the space curvature brings them into resonance
leading to fine tailoring of the cavity photon energy and lifetime and the observation of non-Hermitian exceptional point (EP). At large space curvatures
the role of the WGMs is replaced by high-Q periodic modes protected by the high stability of island-like light trajectory. Our work demonstrates interesting physical mechanisms at the crosspoint of optical chaotic dynamics
non-Hermitian physics
and geodesic optical devices
and would initiate the novel area of geodesic microcavity photonics.
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