Exceptional points and non-Hermitian photonics at the nanoscale

A Li, H Wei, M Cotrufo, W Chen, S Mann, X Ni… - Nature …, 2023 - nature.com
Exceptional points (EPs) arising in non-Hermitian systems have led to a variety of intriguing
wave phenomena, and have been attracting increased interest in various physical platforms …

Topological non-Hermitian skin effect

R Lin, T Tai, L Li, CH Lee - Frontiers of Physics, 2023 - Springer
This article reviews recent developments in the non-Hermitian skin effect (NHSE),
particularly on its rich interplay with topology. The review starts off with a pedagogical …

Two-dimensional reconfigurable non-Hermitian gauged laser array

Z Gao, X Qiao, M Pan, S Wu, J Yim, K Chen, B Midya… - Physical Review Letters, 2023 - APS
Topological effects in photonic non-Hermitian systems have recently led to extraordinary
discoveries including nonreciprocal lasing, topological insulator lasers, and topological …

Transient non-Hermitian skin effect

Z Gu, H Gao, H Xue, J Li, Z Su, J Zhu - Nature Communications, 2022 - nature.com
The discovery of non-Hermitian skin effect (NHSE) has opened an exciting direction for
unveiling unusual physics and phenomena in non-Hermitian system. Despite notable …

Advances and applications on non-Hermitian topological photonics

Q Yan, B Zhao, R Zhou, R Ma, Q Lyu, S Chu, X Hu… - …, 2023 - degruyter.com
Non-Hermitian photonics and topological photonics, as new research fields in optics, have
attracted much attention in recent years, accompanying by a great deal of new physical …

Nonlinear exceptional points with a complete basis in dynamics

K Bai, JZ Li, TR Liu, L Fang, D Wan, M Xiao - Physical Review Letters, 2023 - APS
Exceptional points (EPs) are special spectral singularities at which two or more eigenvalues,
and their corresponding eigenvectors, coalesce and become identical. In conventional …

Observation of the geometry-dependent skin effect and dynamical degeneracy splitting

T Wan, K Zhang, J Li, Z Yang, Z Yang - Science Bulletin, 2023 - Elsevier
The non-Hermitian skin effect is a distinctive phenomenon in non-Hermitian systems, which
manifests as the anomalous localization of bulk states at the boundary. To understand the …

Anomalous Floquet non-Hermitian skin effect in a ring resonator lattice

H Gao, H Xue, Z Gu, L Li, W Zhu, Z Su, J Zhu, B Zhang… - Physical Review B, 2022 - APS
We present a one-dimensional coupled ring resonator lattice exhibiting a variant of the non-
Hermitian skin effect (NHSE) that we call the anomalous Floquet NHSE. Unlike existing …

Quantum-squeezing-induced point-gap topology and skin effect

LL Wan, XY Lü - Physical Review Letters, 2023 - APS
We theoretically predict the squeezing-induced point-gap topology together with a symmetry-
protected Z 2 “skin effect” in a one-dimensional (1D) quadratic-bosonic system. Protected by …

Floquet engineering of the non-Hermitian skin effect in photonic waveguide arrays

S Ke, W Wen, D Zhao, Y Wang - Physical Review A, 2023 - APS
The non-Hermitian skin effect (NHSE), which involves an extensive number of bulk modes
collapsing to open boundaries as skin modes, unveils a variety of unprecedented …