A Chiral Exceptional Point of Gated Graphene Metasurfaces

Soojoeng Baek,Sang Hyun Park, Donghak Oh,Kanghee Lee,Sang-Ha Lee,Hosub Lim,Taewoo Ha, Hyun Sung Park,Bumki Min,Teun-Teun Kim

Frontiers in Optics + Laser Science 2022 (FIO, LS)（2022）

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摘要

We experimentally demonstrate an electrical and spectral way of accessing the chiral EPs with non-Hermitian gate-controlled graphene metasurfaces. This work reveals the EP-related topological and singular features in polarization spaces.

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