Evanescent wave spectral singularities in non-Hermitian photonics
Source abstract
Abstract
Spectral singularities (SSs) emerge at isolated real frequencies when the scattering coefficients of a system diverge, producing scattering anomalies in non-Hermitian systems. Here, based on parity-time symmetry, we introduce SSs for evanescent waves, and explore their exotic features. We show that evanescent wave SSs can realize highly reconfigurable unidirectional lasers and absorbers, and offer the opportunity to observe extreme scattering anomalies associated with SSs in fully passive platforms, decoupling their extreme scattering responses from energy considerations. More broadly, our study opens avenues for non-Hermitian wave engineering, showcasing a link between non-Hermitian physics and structured waves, with implications in nano-optics for extreme wave-matter interactions and functional devices.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Quantum Mechanics and Non-Hermitian Physics · Nonlinear Photonic Systems · Mechanical and Optical Resonators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China
College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210023, China
Photonics Initiative, Advanced Science Research Center, City University of New York, New York, New York 10031, USA
Physics Program, Graduate Center, City University of New York, New York, New York 10016, USA
Funding
National Natural Science Foundation of China · Air Force Office of Scientific Research · Simons Foundation · Fundamental Research Funds for the Central Universities
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