Demonstration of corner states in photonic square-root higher-order topological insulators

Wenchao Yan; Shiqi Xia; Xiuying Liu; Yuqing Xie; Liqin Tang; Liqin Tang; Daohong Song; Daohong Song; Jingjun Xu; Jingjun Xu; Zhigang Chen; Zhigang Chen; Zhigang Chen

doi:10.1364/CLEO_AT.2021.JTu3A.38

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2021),
paper JTu3A.38
•https://doi.org/10.1364/CLEO_AT.2021.JTu3A.38

Demonstration of corner states in photonic square-root higher-order topological insulators

Wenchao Yan, Shiqi Xia, Xiuying Liu, Yuqing Xie, Liqin Tang, Daohong Song, Jingjun Xu, and Zhigang Chen

CLEO: Applications and Technology 2021

San Jose, California United States
9–14 May 2021
ISBN: 978-1-943580-91-0

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Joint Poster Session I (JTu3A)

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W. Yan, S. Xia, X. Liu, Y. Xie, L. Tang, D. Song, J. Xu, and Z. Chen, "Demonstration of corner states in photonic square-root higher-order topological insulators," in Conference on Lasers and Electro-Optics, J. Kang, S. Tomasulo, I. Ilev, D. Müller, N. Litchinitser, S. Polyakov, V. Podolskiy, J. Nunn, C. Dorrer, T. Fortier, Q. Gan, and C. Saraceno, eds., OSA Technical Digest (Optica Publishing Group, 2021), paper JTu3A.38.

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Abstract

We experimentally demonstrate the square-root higher-order topological insulators, unveiling two kinds of corner states that reside in different band gaps of a photonic super-honeycomb lattice established with photorefractive cw-laser-writing.

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