Spin-controlled topological phase transition in non-Euclidean space

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 top...

Full description

Saved in:
Bibliographic Details
Published in:Frontiers of Optoelectronics (Online) 2024-03, Vol.17 (1), p.7-7, Article 7
Main Authors: Du, Zhuochen, Gao, Jinze, Yan, Qiuchen, Lu, Cuicui, Hu, Xiaoyong, Gong, Qihuang
Format: Article
Language:English
Subjects:
Biomedical Engineering and Bioengineering
Electrical Engineering
Engineering
Möbius ring
Non-Euclidean space
Physics
Research Article
Spin-locked effect
Topological phase transition
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 Möbius rings, and we demonstrate the spin-controlled transition between the topological edge state and the bulk state. The Möbius ring, which is designed to have an 8π period, 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 8π period Möbius 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 Möbius rings and opens a way to tune the topological phase in non-Euclidean space. Graphical abstract
ISSN:2095-2767
2095-2759
2095-2767
DOI:10.1007/s12200-024-00110-w