Volume 534, Issue 11 2200288
Research Article

Nonlinear Topological Photonic Insulator in Synthetic Space

Erjie Wu

Erjie Wu

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

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Guangzhen Li

Guangzhen Li

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

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Danying Yu

Danying Yu

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

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Luojia Wang

Luojia Wang

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

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Luqi Yuan

Corresponding Author

Luqi Yuan

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

E-mail: [email protected]

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Xianfeng Chen

Xianfeng Chen

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

Shanghai Research Center for Quantum Sciences, Shanghai, 201315 China

Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan, 250358 China

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First published: 19 September 2022
Citations: 1

Abstract

As an emerging field, nonlinear topological photonics attracts great attention nowadays, where pioneering works show interesting phenomena including topological edge solitons and nonlinearity-induced coupling of light into topological edge states. In this work, the nonlinear effects in a photonic topological insulator in the synthetic space including the frequency axis of light, in a ring resonant array under dynamic modulations are studied, where the four-wave mixing nonlinear process is included. Such nonlinear process not only induces local interactions, but also creates long-range interactions in the frequency dimension. These results show destruction on topologically protected edge states when the nonlinear effects are increasing. Moreover, it also breaks the symmetry in the synthetic space as well as the band structure, which reflects different propagation behaviors for the different input sources with positive and negative frequency shifts and exhibits short-time robustness in weak nonlinear cases. This work hence explores the role of nonlinear effects in affecting the edge modes in the synthetic space, which may be useful in quantum many-body simulations and find possible applications in information processing.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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