Exceptional points in non-Hermitian Photonics: Applications and Recent Developments

TL;DR

This paper reviews recent advances in non-Hermitian photonics focusing on exceptional points, their applications, and how nonlinearities and bound states could influence future developments.

Contribution

It provides a comprehensive overview of recent experimental and theoretical progress in non-Hermitian photonic systems and discusses potential future impacts of nonlinearities and bound states.

Findings

Exceptional points are critical in non-Hermitian photonics.

Recent platforms include waveguides, photonic crystals, and plasmonic systems.

Nonlinearities and bound states may enhance photonic device functionalities.

Abstract

Exceptional points are complex branching singularities of non-Hermitian bands that have lately attracted considerable interest, particularly in non-Hermitian photonics. In this article, we review some recent developments in non-Hermitian photonic platforms such as waveguides, photonic crystals, Fabry-Perot resonators and plasmonic systems, and suggest how optical non-linearities and exceptional bound states can significantly impact the development of non-Hermitian photonics in the near future.