Source-configured symmetry-broken hyperbolic polaritons

Caixing Hu; Tian Sun; Ying Zeng; Weiliang Ma; Zhigao Dai; Xiaosheng Yang; Xinliang Zhang; Peining Li

doi:10.1186/s43593-023-00047-1

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Source-configured symmetry-broken hyperbolic polaritons

eLight Vol. 3, Issue 1, (2023)

RESEARCH ARTICLE | Updated：2024-09-25

- Source-configured symmetry-broken hyperbolic polaritons
- Affiliations：
  
  Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  Optics Valley Laboratory, Hubei 430074, China
  Faculty of Materials Science and Chemistry, Engineering Research Center of NanoGeomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, China
  Xidian University, Xi'an 710126, China
- Author bio：
  
  *Zhigao Daidaizhigao@cug.edu.cn
  Xiaosheng Yangxiaosheng_yang@outlook.com
  Xinliang Zhangxlzhang@mail.hust.edu.cn
  Peining Lilipn@hust.edu.cn
- Funds：
- DOI：10.1186/s43593-023-00047-1
  CLC：
- Published：2023，
  
  Published Online：07 June 2023，
  
  Received：02 April 2023，
  
  Revised：04 May 2023，
  
  Accepted：08 May 2023
- Accepted：
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Caixing Hu, Tian Sun, Ying Zeng, et al. Source-configured symmetry-broken hyperbolic polaritons. [J]. eLight, 2023,3(1).
DOI：

Caixing Hu, Tian Sun, Ying Zeng, et al. Source-configured symmetry-broken hyperbolic polaritons. [J]. eLight, 2023,3(1). DOI： 10.1186/s43593-023-00047-1.

摘要

Abstract

Polaritons are quasi-particles that combine light with matter

enabling precise control of light at deep subwavelength scales. The excitation and propagation of polaritons are closely linked to the structural symmetries of the host materials

resulting in symmetrical polariton propagation in high-symmetry materials. However

in low-symmetry crystals

symmetry-broken polaritons exist

exhibiting enhanced directionality of polariton propagation for nanoscale light manipulation and steering. Here

we theoretically propose and experimentally demonstrate the existence of symmetry-broken polaritons

with hyperbolic dispersion

in a high-symmetry crystal. We show that an optical disk-antenna positioned on the crystal surface can act as an in-plane polarized excitation source

enabling dynamic tailoring of the asymmetry of hyperbolic polariton propagation in the high-symmetry crystal over a broad frequency range. Additionally

we provide an intuitive analysis model that predicts the condition under which the asymmetric polaritonic behavior is maximized

which is corroborated by our simulations and experiments. Our results demonstrate that the directionality of polariton propagation can be conveniently configured

independent of the structure symmetry of crystals

providing a tuning knob for the polaritonic response and in-plane anisotropy in nanophotonic applications.

关键词

Keywords

Hyperbolic polaritonsNear-field excitationCrystal symmetryIn-plane polarizationCalcite

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