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Title: Photonic amorphous topological insulator
Authors: Zhou, Peiheng
Liu, Gui-Geng
Ren, Xin
Yang, Yihao
Xue, Haoran
Bi, Lei
Deng, Longjiang
Chong, Yidong
Zhang, Baile
Keywords: Science::Physics
Issue Date: 2020
Source: Zhou, P., Liu, G., Ren, X., Yang, Y., Xue, H., Bi, L., Deng, L., Chong, Y. & Zhang, B. (2020). Photonic amorphous topological insulator. Light : Science and Applications, 9(1).
Project: MOE2016-T3-1-006
MOE 2018-T2-1-022(S).
Journal: Light : Science and Applications
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.
ISSN: 2047-7538
DOI: 10.1038/s41377-020-00368-7
Rights: © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license,and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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