中国光学（中英文）2025，Vol.18Issue(1)：17-28,12.DOI:10.37188/CO.2024-0119
无源非厄密超构表面奇异点现象研究进展
Research progress in the phenomenon of exceptional point on passive non-Hermitian metasurfaces
摘要
Abstract
In non-Hermitian systems,controlling the gain or loss of the system can enable the system state transition from PT-symmetry to broken PT-symmetry.This transition leads to a special point known as the exceptional point,where the system eigenvalues and eigenstates become simultaneously degenerate.When combined with metasurfaces,the exceptional point leads to various intriguing optical phenomena,such as asymmetric transmission,exceptional topological phase,and the non-Hermitian skinning effect.However,active metasurfaces introducing gains are difficult to realize experimentally.Therefore,designing passive metasurfaces using equivalent gains through loss becomes a powerful tool in non-Hermitian research.In this paper,we review the theoretical models,research progress,specific applications,and experimental design in the study of the exceptional point on passive non-Hermitian metasurfaces and look forward to the future dir-ection of this field.关键词
奇异点/非厄密/超构表面/无源系统Key words
exceptional point/non-hermitian/metasurfaces/passive systems分类
信息技术与安全科学引用本文复制引用
卓奕州,韦中超..无源非厄密超构表面奇异点现象研究进展[J].中国光学（中英文）,2025,18(1):17-28,12.基金项目
国家自然科学基金(No.61774062) （No.61774062）
广东省自然科学基金(No.2021A1515010352) （No.2021A1515010352）
华南师范大学研究生科研创新计划项目(No.2024KYLX073)Supported by the National Natural Science Foundation of China(No.61774062) （No.2024KYLX073）
the Natural Science Founda-tion of Guangdong Province,China(No.2021A1515010352) （No.2021A1515010352）
the Scientific Research Innovation Project of Graduate School of South China Normal University(No.2024KYLX073) （No.2024KYLX073）
