Recently, the Metamaterials and Fiber Optic Devices Research Group from the School of Physics and Optoelectronic Engineering at Harbin Engineering University, in collaboration with the Metamaterials Research Group of the Department of Physics at the University of Hong Kong, proposed a new type of magneto-optical chiral metasurface that achieves polarization-independent non-reciprocal light transmission. The research findings, titled "Magneto-Optical Chiral Metasurfaces for Achieving Polarization-Independent Nonreciprocal Transmission," were published on July 31 in the prestigious international journal Science Advances. This work lays a solid foundation for the development of compact, polarization-insensitive non-reciprocal devices.

Schematic Diagram of the Magneto-optical Chiral Metasurface Principle

Associate Professor LI Wenjia from the School of Physics and Optoelectronic Engineering at Harbin Engineering University is the paper's first author. Dr. YANG Qingdong and postdoctoral fellow You Oubo from the University of Hong Kong are co-first authors. Professors Shi Jinhui and LIU Jianlong from Harbin Engineering University, along with Professor ZHANG Shuang from the University of Hong Kong, are the corresponding authors. This research was supported by the New Foundation for Science, the National Natural Science Foundation of China, the Natural Science Foundation of Heilongjiang Province, and the School's Basic Research Enhancement Plan.