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Photonic Floquet Skin-Topological Effect
Yeyang Sun1, Xiangrui Hou1, Tuo Wan1
1School of Physics and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou 310027, Zhejiang Province, China.
Physical Review Letters
|February 23, 2024
Summary
Researchers explored the interplay between non-Hermitian skin effects and photonic topological edge states. They demonstrated a "Floquet skin-topological effect" in driven photonic lattices, localizing edge states at corners.
Area of Science:
- Physics
- Optics
- Non-Hermitian Physics
Background:
- Non-Hermitian skin effect and photonic topological edge states are significant areas of research.
- The interaction between these phenomena remains largely unexplored.
Purpose of the Study:
- To propose and experimentally demonstrate the
- Floquet skin-topological effect,
- which combines non-Hermitian skin effects with Floquet topological edge states.
Main Methods:
- Inducing non-Hermitian skin effect in a periodically driven one-dimensional (1D) system via structured loss.
- Investigating the interaction in a two-dimensional (2D) Floquet topological photonic lattice with structured loss.
Main Results:
- Observed localization of one-way edge states onto specific corners, exhibiting both non-Hermitian skin effect and topological properties.
- Demonstrated a topological switch for the skin-topological effect using a phase-transition mechanism.
Conclusions:
- The study establishes a novel
- Floquet skin-topological effect
- by merging non-Hermiticity and topological edge states.
- This work opens avenues for realizing non-Hermitian topological phenomena in nonlinear and quantum systems.
