Details

Autor(en) / Beteiligte

• Qian, Jie
• Li, Jie
• Zhu, Shi-Yao
• You, J Q
• Wang, Yi-Pu

Titel

Probing PT-Symmetry Breaking of Non-Hermitian Topological Photonic States via Strong Photon-Magnon Coupling

Ist Teil von

• Physical review letters, 2024-04, Vol.132 (15), p.156901-156901

Ort / Verlag

United States

Erscheinungsjahr

2024

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• Light-matter interaction is crucial to both understanding fundamental phenomena and developing versatile applications. Strong coupling, robustness, and controllability are the three most important aspects in realizing light-matter interactions. Topological and non-Hermitian photonics have provided frameworks for robustness and control flexibility, respectively. How to engineer the properties of the edge state such as photonic density of state by using non-Hermiticity while ensuring topological protection has not been fully studied. Here we construct a parity-time-symmetric dimerized photonic lattice and probe the spontaneous PT-symmetry breaking of the edge states by utilizing the strong coupling between the photonic mode and a spin ensemble. Our Letter presents an accurate and almost noninvasive approach for investigating non-Hermitian topological states, while also offering methodologies for the implementation and manipulation of topological light-matter interactions.