期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.014301
关键词
-
资金
- Office of Naval Research [N00014-19-1-2011]
- Simons Foundation
The study proposes a new pathway for PT symmetry using the evanescent field excitation of anti-PT-symmetric structures, demonstrating an important link between non-Hermitian physics and near-field interactions with implications in nanophotonics, plasmonics, and acoustics for applications in nanoimaging, sensing, and communications.
Parity-time (PT) symmetry, satisfied when a system commutes under combined parity and time-reversal operations, enables extreme optical responses in non-Hermitian systems with balanced distributions of gain and loss. In this Letter, we propose a different path for PT symmetry utilizing the evanescent field excitation of anti-PT-symmetric structures, which anticommute with the PT operator and do not necessarily require gain. Beyond offering a robust platform to explore PT symmetry, our study showcases an important link between non-Hermitian physics and near-field interactions, with implications in nanophotonics, plasmonies, and acoustics for nanoimaging, sensing, and communications.
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