Topological bound modes in anti-PT-symmetric optical waveguide arrays | Zendy

Shaolin Ke | Zendy; Dong Zhao | Zendy; Jianxun Liu | Zendy; Qingjie Liu | Zendy; Qing Liao | Zendy; Bing Wang | Zendy; Peixiang Lu | Zendy

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Topological bound modes in anti-PT-symmetric optical waveguide arrays

Author(s) -

Shaolin Ke,

Dong Zhao,

Jianxun Liu,

Qingjie Liu,

Qing Liao,

Bing Wang,

Peixiang Lu

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.013858

Subject(s) - topology (electrical circuits) , physics , coupling (piping) , parity (physics) , waveguide , optics , photonics , topological order , quantum , phase (matter) , binary number , symmetry (geometry) , quantum optics , phase transition , quantum mechanics , materials science , mathematics , geometry , arithmetic , combinatorics , metallurgy

We investigate the topological bound modes in a binary optical waveguide array with anti-parity-time (PT) symmetry. The anti-PT-symmetric arrays are realized by incorporating additional waveguides to the bare arrays, such that the effective coupling coefficients are imaginary. The systems experience two kinds of phase transition, including global topological order transition and quantum phase transition. As a result, the system supports two kinds of robust bound modes, which are protected by the global topological order and the quantum phase, respectively. The study provides a promising approach to realizing robust light transport by utilizing mediating components.

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