Spin‑controlled topological phase transition in non‑Euclidean space
作者机构：State Key Laboratory for Mesoscopic Physics and Department of PhysicsCollaborative Innovation Center of Quantum Matter and Frontiers Science Center for Nano‑OptoelectronicsBeijing Academy of Quantum Information SciencesPeking UniversityBeijing 100871China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of EducationBeijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China Peking University Yangtze Delta Institute of OptoelectronicsNantong 226010China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China Hefei National LaboratoryHefei 230088China
出 版 物：《Frontiers of Optoelectronics》 (光电子前沿（英文版）)
年 卷 期：2024年第17卷第1期
页 面：67-76页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 0701[理学-数学]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.91950204,92150302,and 12274031) the Innovation Program for Quantum Science and Technology(No.2021ZD0301502) Beijing Institute of Technology Research Fund Program for Teli Young Fellows,Beijing Institute of Technology Science and Technology Innovation Plan Innovative Talents Science,and Technology Funding Special Plan(No.2022CX01006).
主 题：Topological phase transition Non-Euclidean space Möbius ring Spin-locked effect
摘 要：Modulation of topological phase transition has been pursued by researchers in both condensed matter and optics research fields,and has been realized in Euclidean systems,such as topological photonic crystals,topological metamaterials,and coupled resonator arrays.However,the spin-controlled topological phase transition in non-Euclidean space has not yet been explored.Here,we propose a non-Euclidean configuration based on Mobius rings,and we demonstrate the spin-controlled transition between the topological edge state and the bulk state.The Mobius ring,which is designed to have an 8πperiod,has a square cross section at the twist beginning and the length/width evolves adiabatically along the loop,accompanied by conversion from transverse electric to transverse magnetic modes resulting from the spin-locked effect.The 8πperiod Mobius rings are used to construct Su–Schrieffer–Heeger configuration,and the configuration can support the topological edge states excited by circularly polarized light,and meanwhile a transition from the topological edge state to the bulk state can be realized by controlling circular polarization.In addition,the spin-controlled topological phase transition in non-Euclidean space is feasible for both Hermitian and non-Hermitian cases in 2D systems.This work provides a new degree of polarization to control topological photonic states based on the spin of Mobius rings and opens a way to tune the topological phase in non-Euclidean space.
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