Bibliographic Details
| Title: |
Observing non-Hermiticity induced chirality breaking in a synthetic Hall ladder |
| Authors: |
Rui Ye, Yanyan He, Guangzhen Li, Luojia Wang, Xiaoxiong Wu, Xin Qiao, Yuanlin Zheng, Liang Jin, Da-Wei Wang, Luqi Yuan, Xianfeng Chen |
| Source: |
Light: Science & Applications, Vol 14, Iss 1, Pp 1-11 (2025) |
| Publisher Information: |
Nature Publishing Group, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Applied optics. Photonics
LCC:Optics. Light |
| Subject Terms: |
Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467 |
| More Details: |
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. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2047-7538 |
| Relation: |
https://doaj.org/toc/2047-7538 |
| DOI: |
10.1038/s41377-024-01700-1 |
| Access URL: |
https://doaj.org/article/cd9b780e4152431a93daa795d8997350 |
| Accession Number: |
edsdoj.9b780e4152431a93daa795d8997350 |
| Database: |
Directory of Open Access Journals |
