Branching High‐Order Exceptional Points in Non‐Hermitian Optical Systems
Abstract
Exceptional points are complex‐valued spectral singularities that lead to a host of intriguing features such as loss‐induced transparency—a counterintuitive process in which an increase in the system's overall loss can lead to enhanced transmission. In general, the associated enhancements scale with the order of the exceptional points. Consequently, it is of great interest to devise new strategies to implement realistic devices capable of exhibiting high‐order exceptional points. Here, it is shown that high‐order ‐photon exceptional points can be generated by exciting non‐Hermitian waveguide arrangements with coherent light states. Using photon‐number resolving detectors it then becomes possible to observe ‐photon enhanced loss‐induced transparency in the quantum realm. Further, it is analytically shown that the number‐resolved dynamics occurring in the same nonconservative waveguide arrays will exhibit eigenspectral ramifications having several exceptional points associated to different sets of eigenmodes and dissipation rates.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 19, 2022
- Source ID
- 10.1002/lpor.202100707
Entities
People
- Armando Pérez-Leija
- Demetrios N. Christodoulides
- Konrad Tschernig
- Kurt Busch
Organizations
- Air Force Office of Scientific Research
- German Research Foundation
- Humboldt-Universität zu Berlin
- Leibniz Association
- University of Central Florida