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Non-Hermitian guided modes and exceptional points using loss-free negative-index materials
- Publication Year :
- 2023
-
Abstract
- We analyze the guided modes in coupled waveguides made of negative-index materials without gain or loss. We show that it supports non-Hermitian phenomenon on the existence of guided mode versus geometric parameters of the structure. The non-Hermitian effect is different from parity-time (PT) symmetry, and can be explained by a simple coupled-mode theory with an anti-PT symmetry. The existence of exceptional points and slow-light effect are discussed. This work highlights the potential of loss-free negative-index materials in the study of non-Hermitian optics.
- Subjects :
- Physics - Optics
Physics - Classical Physics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2303.15668
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OE.487278