Actively Reconfigurable Valley Topological Edge and Corner States in Photonic Crystals Based on Phase Change Material Ge2Sb2Te5【增强内容出版】

成果类型：

期刊论文

作者：

Li Wei;Peng Yuxiang;Su Peihao;Li Jianbo;Wang Kaijun;...

作者机构：

[Li Wei; Peng Yuxiang; Su Peihao; Li Jianbo; Wang Kaijun; Liu Exian; He Mengdong] College of Science, Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Hunan, Changsha, 410004, China

[Liu Jianqiang] College of Science, Jiujiang University, Jiangxi, Jiujiang, 332005, China

语种：

英文

关键词：

topological edge states, topological corner states, phase change material, active reconfiguration, topological photonic crystal

期刊：

激光与光电子学进展

ISSN：

1006-4125

年：

2024

卷：

61

期：

5

页码：

0536001

DOI：

10.3788/LOP232334

机构署名：

本校为第一机构

院系归属：

理学院

摘要：

The immunity of topological states against backscattering and structural defects provides them with a unique advantage in the exploration and design of high-precision low-loss optical devices. However, the operating bandwidth of the topological states in certain photonic structures is difficult to actively tune and flexibly reconfigure. In this study, we propose a valley topological photonic crystal (TPC) comprising two inverse honeycomb photonic crystals, consisting of hexagonal silicon and Ge2Sb2Te5 (GST) rods. When GST transitions from the a...

摘要(中文)：

The immunity of topological states against backscattering and structural defects provides them with a unique advantage in the exploration and design of high-precision low-loss optical devices. However, the operating bandwidth of the topological states in certain photonic structures is difficult to actively tune and flexibly reconfigure. In this study, we propose a valley topological photonic crystal (TPC) comprising two inverse honeycomb photonic crystals, consisting of hexagonal silicon and Ge2Sb2Te5 (GST) rods. When GST transitions from the a...

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