Dispersion engineering by rotational symmetry breaking in an optical microcavity

Jian-Zheng Ren; Li-Jie Li; Rui-Qi Zhang; Zhi-Yan Wang; Qi-Tao Cao; Yun-Feng Xiao

doi:10.1038/s41377-025-02169-2

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Dispersion engineering by rotational symmetry breaking in an optical microcavity

Original Articles

- Dispersion engineering by rotational symmetry breaking in an optical microcavity
- Light: Science & Applications Vol. 15, Issue 3, Pages: 895-902(2026)
- Affiliations：
  
  1.State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, New Cornerstone Science Labotatory, School of Physics, Peking University, Beijing 100871, China
  2.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
- Author bio：
  
  Qi-Tao Cao (caoqt@pku.edu.cn)
  Yun-Feng Xiao (yfxiao@pku.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02169-2
  CLC：
- Received：03 December 2025，
  
  Accepted：13 December 2025，
  
  Online First：22 January 2026，
  
  Published：31 March 2026
- Accepted：
Scan QR Code
Ren, J. Z. et al. Dispersion engineering by rotational symmetry breaking in an optical microcavity. Light: Science & Applications, 15, 895-902 (2026).
DOI：

Ren, J. Z. et al. Dispersion engineering by rotational symmetry breaking in an optical microcavity. Light: Science & Applications, 15, 895-902 (2026). DOI： 10.1038/s41377-025-02169-2.

摘要

Abstract

Dispersion engineering is pivotal for nonlinear optics

yet it often faces challenges posed by material and structural limitations. Here

we establish rotational symmetry breaking as the guiding principle for dispersion engineering in optical microcavities. Through boundary deformation

multi-branch global dispersion emerges in island modes

and local dispersion is controlled via resonance-assisted tunneling between quasi-whispering gallery modes. Enabled by the global dispersion

the optical parametric oscillation is predicted in blue-violet light spectrum with high efficiency (> 55%) and large frequency separation (> 180 THz). Using the local dispersion engineering

the doubly-resonant enhancement of second-harmonic generation is regulated by the resonance-assisted tunneling.

关键词

Keywords

references

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