Double-bowl state in photonic Dirac nodal line semimetal

Mengying Hu; Ye Zhang; Xi Jiang; Tong Qiao; Qiang Wang; Shining Zhu; Meng Xiao; Hui Liu

doi:10.1038/s41377-021-00614-6

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Double-bowl state in photonic Dirac nodal line semimetal

Articles

- Double-bowl state in photonic Dirac nodal line semimetal
- Light: Science & Applications Vol. 10, Issue 9, Pages: 1761-1767(2021)
- Affiliations：
  
  1.National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
  2.Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
  3.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, 430072, Wuhan, China
- Author bio：
  
  Meng Xiao(phmxiao@whu.edu.cn)
  Hui Liu(liuhui@nju.edu.cn)
- Funds：
- DOI：10.1038/s41377-021-00614-6
  CLC：
- Published：30 September 2021，
  
  Published Online：20 August 2021，
  
  Received：11 March 2021，
  
  Revised：08 August 2021，
  
  Accepted：09 August 2021
- Accepted：
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Hu, M. Y. et al. Double-bowl state in photonic Dirac nodal line semimetal. Light: Science & Applications, 10, 1761-1767 (2021).
DOI：

Hu, M. Y. et al. Double-bowl state in photonic Dirac nodal line semimetal. Light: Science & Applications, 10, 1761-1767 (2021). DOI： 10.1038/s41377-021-00614-6.

摘要

Abstract

The past decade has seen a proliferation of topological materials for both insulators and semimetals in electronic systems and classical waves. Topological semimetals exhibit topologically protected band degeneracies

such as nodal points and nodal lines. Dirac nodal line semimetals (DNLS)

which own four-fold line degeneracy

have drawn particular attention. DNLSs have been studied in electronic systems but there is no photonic DNLS. Here in this work

we provide a new mechanism

which is unique for photonic systems to investigate a stringent photonic DNLS. When truncated

the photonic DNLS exhibits double-bowl states (DBS)

which comprise two sets of perpendicularly polarized surface states. In sharp contrast to nondegenerate surface states in other photonic systems

here the two sets of surface states are almost degenerate over the whole-spectrum range. The DBS and the bulk Dirac nodal ring (DNR) dispersion along the relevant directions

are experimentally resolved.

关键词

Keywords

references

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