Hosting exceptional points in 1D photonic bandgap waveguide for mode engineering

TL;DR

This paper demonstrates the creation of four second-order exceptional points in a 1D photonic bandgap waveguide, enabling advanced mode control through tailored gain-loss profiles.

Contribution

It introduces a novel 1D photonic waveguide design that hosts multiple exceptional points for enhanced mode engineering capabilities.

Findings

Four second-order exceptional points achieved

Mode interactions controlled by gain-loss distribution

Potential for improved photonic device performance

Abstract

We report a planar 1D photonic bandgap waveguide exhibiting four second-order exceptional points (EP2s). The interactions between the selective pairs of supported quasi-guided TE modes are modulated by spatial distribution of transverse in-homogeneous gain-loss profile.