Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder

Rui Ye; Yanyan He; Guangzhen Li; Luojia Wang; Xiaoxiong Wu; Xin Qiao; Yuanlin Zheng; Liang Jin; Da-Wei Wang; Luqi Yuan; Xianfeng Chen

doi:10.1038/s41377-024-01700-1

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Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder

Original Articles

- Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder
- Light: Science & Applications Vol. 14, Issue 1, Pages: 280-290(2025)
- Affiliations：
  
  1.State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
  2.School of Physics, Nankai University, Tianjin, 300071, China
  3.Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, School of Physics, and State Key Laboratory for Extreme Photonics and Instrumentation, Zhejiang University, Hangzhou, 310027, China
  4.Shanghai Research Center for Quantum Sciences, Shanghai, 201315, China
  5.Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan, 250358, China
- Author bio：
  
  Yanyan He (yanyhe@sjtu.edu.cn)
  Luqi Yuan (yuanluqi@sjtu.edu.cn)
  Xianfeng Chen (xfchen@sjtu.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01700-1
  CLC：
- Published：31 January 2025，
  
  Published Online：08 January 2025，
  
  Received：17 April 2024，
  
  Revised：10 October 2024，
  
  Accepted：2024-11-26
- Accepted：
Scan QR Code
Ye, R. et al. Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder. Light: Science & Applications, 14, 280-290 (2025).
DOI：

Ye, R. et al. Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder. Light: Science & Applications, 14, 280-290 (2025). DOI： 10.1038/s41377-024-01700-1.

摘要

Abstract

Non-Hermitian topological photonics plays a key role in bridging topological matter with gain and loss engineering in optics. Here we report the experimental observation of the break of chiral currents in a Hall ladder from the non-Hermiticity by constructing synthetic frequency dimension in two rings

where currents on both legs of the ladder co-propagate in the same direction. The origin of such phenomena is resulted from the interplay between the effective magnetic flux and the on-site gain and loss. Such non-Hermitian co-propagating currents exhibit characteristics of unidirectional frequency conversion in both rings

and moreover

different from the counterpart in Hermitian systems

can provide a method to probe the signatures of the non-Hermitian skin effect from steady-state bulk dynamics. Our model is further extended to models including next-nearest-neighbor couplings

pointing to a way for observing the non-Hermitian signature with higher winding number

and provides a new control knob for light manipulation with the topological dissipation engineering.

关键词

Keywords

references

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