Photonic amorphous topological insulator

Peiheng Zhou; Gui-Geng Liu; Xin Ren; Yihao Yang; Haoran Xue; Lei Bi; Longjiang Deng; Yidong Chong; Baile Zhang

doi:10.1038/s41377-020-00368-7

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Photonic amorphous topological insulator

Article

- Photonic amorphous topological insulator
- Photonic amorphous topological insulator
- LSA 2020年9卷第4期页码：1272-1279
- Affiliations：
  
  1.National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, 610054 Chengdu, China
  2.Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
  3.Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
- Author bio：
  
  Yihao Yang (yang.yihao@ntu.edu.sg)
  Yidong Chong (yidong@ntu.edu.sg)
  Baile Zhang (blzhang@ntu.edu.sg)
- Funds：
- DOI：10.1038/s41377-020-00368-7
  中图分类号：
- 纸质出版日期：2020，
  
  网络出版日期：2020-07-24，
  
  收稿日期：2020-03-30，
  
  修回日期：2020-07-06，
  
  录用日期：2020-07-08
- Accepted：
Scan QR Code
Photonic amorphous topological insulator[J]. LSA, 2020,9(4):1272-1279.

Zhou, P. et al. Photonic amorphous topological insulator. Light: Science & Applications, 9, 1272-1279 (2020).
Photonic amorphous topological insulator[J]. LSA, 2020,9(4):1272-1279. DOI： 10.1038/s41377-020-00368-7.

Zhou, P. et al. Photonic amorphous topological insulator. Light: Science & Applications, 9, 1272-1279 (2020). DOI： 10.1038/s41377-020-00368-7.

摘要

Abstract

The current understanding of topological insulators and their classical wave analogs

such as photonic topological insulators

is mainly based on topological band theory. However

standard band theory does not apply to amorphous phases of matter

which are formed by non-crystalline lattices with no long-range positional order but only short-range order

exhibiting unique phenomena such as the glass-to-liquid transition. Here

we experimentally investigate amorphous variants of a Chern number-based photonic topological insulator. By tuning the disorder strength in the lattice

we demonstrate that photonic topological edge states can persist into the amorphous regime prior to the glass-to-liquid transition. After the transition to a liquid-like lattice configuration

the signatures of topological edge states disappear. This interplay between topology and short-range order in amorphous lattices paves the way for new classes of non-crystalline topological photonic bandgap materials.

关键词

Keywords

references

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