On-chip topological edge state cavities

Wenhao Wang; Zhonglei Shen; Yi Ji Tan; Kaiji Chen; Ranjan Singh

doi:10.1038/s41377-025-02017-3

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On-chip topological edge state cavities

Original Articles

- On-chip topological edge state cavities
- Light: Science & Applications Vol. 14, Issue 11, Pages: 3558-3565(2025)
- Affiliations：
  
  1.Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
  2.Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore, Singapore
  3.Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN, USA
- Author bio：
  
  Ranjan Singh (rsingh3@nd.edu)
- Funds：
- DOI：10.1038/s41377-025-02017-3
  CLC：
- Received：17 February 2025，
  
  Revised：2025-07-22，
  
  Accepted：19 August 2025，
  
  Published Online：18 September 2025，
  
  Published：30 November 2025
- Accepted：
Scan QR Code
Wang, W. H. et al. On-chip topological edge state cavities. Light: Science & Applications, 14, 3558-3565 (2025).
DOI：

Wang, W. H. et al. On-chip topological edge state cavities. Light: Science & Applications, 14, 3558-3565 (2025). DOI： 10.1038/s41377-025-02017-3.

摘要

Abstract

Confining light in an on-chip photonic cavity with strong light-matter interactions is pivotal for numerous applications in optical and quantum sciences. Recently

topological valley photonics has introduced new schemes for light confinement with topological protection

enabling robust on-chip light manipulation. Here

we present a topological edge state cavity that confines light within a topological bandgap while robustly guiding it to circulate around the cavity via topological edge states. We demonstrate a giant enhancement in the intrinsic quality factor by three orders of magnitude

while simultaneously increasing the free spectral range from 5.1 to 7.1 GHz through tailoring the radiation leakage and group index of topological valley edge state. Our work provides a novel and robust on-chip cavity platform for a wide range of applications

including high-capacity communications

nonlinear optics

atomic clocks

and quantum photonics.

关键词

Keywords

references

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