Non-Hermitian chiral degeneracy of gated graphene metasurfaces

Soojeong Baek; Sang Hyun Park; Donghak Oh; Kanghee Lee; Sangha Lee; Hosub Lim; Taewoo Ha; Hyun Sung Park; Shuang Zhang; Lan Yang; Bumki Min; Teun-Teun Kim

doi:10.1038/s41377-023-01121-6

Light: Science & Applications (Apr 2023)

Non-Hermitian chiral degeneracy of gated graphene metasurfaces

Soojeong Baek,
Sang Hyun Park,
Donghak Oh,
Kanghee Lee,
Sangha Lee,
Hosub Lim,
Taewoo Ha,
Hyun Sung Park,
Shuang Zhang,
Lan Yang,
Bumki Min,
Teun-Teun Kim

Affiliations

Soojeong Baek: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST)
Sang Hyun Park: Department of Electrical and Computer Engineering, University of Minnesota
Donghak Oh: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST)
Kanghee Lee: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST)
Sangha Lee: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST)
Hosub Lim: Harvard Institute of Medicine, Harvard Medical School, Harvard University, Brigham and Women’s Hospital
Taewoo Ha: Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University
Hyun Sung Park: Samsung Advanced Institute of Technology, Samsung Electronics, Samsung-ro
Shuang Zhang: Department of Physics, The University of Hong Kong
Lan Yang: Department of Electrical and Systems Engineering, Washington University
Bumki Min: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST)
Teun-Teun Kim: Department of Physics, University of Ulsan, Daehak-ro

DOI: https://doi.org/10.1038/s41377-023-01121-6
Journal volume & issue: Vol. 12, no. 1
pp. 1 – 10

Abstract

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We report the precise real-time probing of chiral exceptional points with an electrical and spectral method and the consequences of chiral mode collapsing by an active platform of hybridised non-Hermitian metasurfaces with gated graphene microribbons.

Published in Light: Science & Applications

ISSN: 2047-7538 (Online)
Publisher: Nature Publishing Group
Country of publisher: United Kingdom
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: https://www.nature.com/lsa/

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