journal article·2023-09

Harnessing Anti‐Parity‐Time Phase Transition in Coupled Topological Photonic Valley Waveguides

Xinrong Xie, Maoliang Wei, Yumeng Yang, Yuanzhen Li, Kunhao Lei, Zijian Zhang, Chi Wang, Chuyu Zhong, Lan Li, Zuojia Wang, Wei E. I. Sha, Erping Li, Haoran Xue, Zhaoju Yang, Luqi Yuan, Hongsheng Chen, Hongtao Lin, Fei Gao

Advanced Functional Materials· Volume 33· Issue 38
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Abstract

Abstract Topological and non‐Hermitian physics provide powerful tools for manipulating light in different ways. Recently, intense studies have converged on the interplay between topology and non‐Hermiticity, and have produced fruitful results in various photonic settings. Currently, the realization of this interplay falls under the paradigm of enabling energy exchange between topological systems and the environment. Beyond this paradigm, it is revealed that a non‐Hermitian phenomenon, i.e., the anti‐parity‐time phase transition, naturally emerges from a Hermitian system realized by coupled topological valley waveguides. Such phase transition gives two exotic topological superstates in the spectral domain. By further combining the two phases with topological robustness, a photonic topological bi‐functional device is realized on a silicon‐on‐insulator platform at telecommunications frequencies. The results provide a new perspective on light manipulation and integrated device applications.
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Research context

OpenAlex topics: Quantum Mechanics and Non-Hermitian Physics · Topological Materials and Phenomena · Nonlinear Photonic Systems

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Interdisciplinary Center for Quantum Information State Key Laboratory of Extreme Photonics and Instrumentation ZJU‐Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 310027 China

International Joint Innovation Center The Electromagnetics Academy at Zhejiang University Zhejiang University Haining 314400 China

Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Jinhua Institute of Zhejiang University Zhejiang University Jinhua 321099 China

Shaoxing Institute of Zhejiang University Zhejiang University Shaoxing 312000 China

Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou 310024 China

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Department of Physics Zhejiang University Hangzhou 310027 China

State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · Natural Science Foundation of Zhejiang Province · Fundamental Research Funds for the Central Universities

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