High Circular Dichroism Terahertz Chiral Metasurfaces Enabled by Quasi-Bound States in the Continuum

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Abstract

The concept of Bound State in the Continuum (BIC) describes a phenomenon where a state remains confined within the radiation continuum of a system. In the context of the terahertz frequency range, BIC offers a promising approach for creating devices with exceptionally high quality factors (Q-factors) and enabling strong interactions between terahertz radiation and matter, contributing significantly to the advancement of terahertz science and technology. In this work, we propose a chiral metasurface design for terahertz frequencies that achieves significant circular dichroism (CD) of 0.944. This is accomplished by disrupting the symmetry within the plane, which leads to the excitation of quasi-bound states in the continuum (quasi-BICs), resulting in a high Q-factor.

Original languageEnglish
Title of host publicationProceedings of the 5th China and International Young Scientist Terahertz Conference, Volume 1 - YTHZ 2024
EditorsChao Chang, Yaxin Zhang, Ziran Zhao, Yiming Zhu
PublisherSpringer Science and Business Media Deutschland GmbH
Pages57-60
Number of pages4
ISBN (Print)9789819737857
DOIs
StatePublished - 2024
Event5th China and International Young Scientist Terahertz Conference, YTHZ 2024 - Chengdu, China
Duration: 22 Mar 202424 Mar 2024

Publication series

NameSpringer Proceedings in Physics
Volume400 SPPHY
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference5th China and International Young Scientist Terahertz Conference, YTHZ 2024
Country/TerritoryChina
CityChengdu
Period22/03/2424/03/24

Keywords

  • Bound-states In the Continuum
  • Chiral metasurface
  • Circular dichroism

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