Photo by 20164rhodi from unsplash
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… Click to show full 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 (P T) symmetry, and can be explained by a simple coupled-mode theory with an anti-P T 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.
Journal Title: Optics express
Year Published: 2023
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!