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Related Experiment Video

Updated: Aug 24, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Manipulating cavity photon dynamics by topologically curved space.

Yongsheng Wang¹, Yuhao Ren², Xiaoxuan Luo¹

¹Key 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.

Light, Science & Applications

|October 24, 2022

Summary

Researchers engineered asymmetric microcavities on curved surfaces, enhancing light confinement and quality factors by 200x. This work introduces geodesic microcavity photonics, merging optics, chaos, and non-Hermitian physics.

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Area of Science:

Photonics
Non-Hermitian Physics
Optical Chaos

Background:

Asymmetric microcavities are crucial for on-chip optical information processing.
Whispering-gallery modes (WGMs) are key light confinement mechanisms in microcavities.

Purpose of the Study:

To establish asymmetric microcavities on topologically curved surfaces.
To investigate curvature-mediated photon-lifetime engineering.
To explore resonance phenomena and non-Hermitian exceptional points (EPs).

Main Methods:

Fabrication of asymmetric microcavities on curved surfaces.
Analysis of geodesic light trajectories and their impact on cavity modes.
Characterization of quality factors and coupling dynamics.

Main Results:

Quality factors of periodic island modes enhanced up to 200 times.
Observation of strong and weak coupling between modes of different origins.
Demonstration of non-Hermitian exceptional points (EPs) at large space curvatures.
Replacement of WGMs by high-Q periodic modes at large curvatures.

Conclusions:

Curvature-mediated engineering significantly enhances microcavity performance.
Geodesic microcavities offer novel pathways for tailoring optical properties.
This research bridges optical chaos, non-Hermitian physics, and geodesic optics, initiating geodesic microcavity photonics.