Fabry-Perot Bound States in the Continuum in an Anisotropic Photonic Crystal

TL;DR

This paper demonstrates the existence of Fabry-Perot bound states in the continuum within an anisotropic photonic crystal containing defect layers, providing an analytic solution and conditions for their occurrence.

Contribution

It introduces a fully analytic approach to identify FP-BIC in anisotropic photonic crystals with defect layers, advancing understanding of bound states in complex structures.

Findings

FP-BIC can be supported in anisotropic photonic crystals with defect layers

Analytic solution for scattering problem in such systems

Derived conditions for the existence of FP-BIC

Abstract

An anisotropic photonic crystal containing two anisotropic defect layers is considered. It is demonstrated that the system under can support a Fabry-Perot bound state in the continuum (FP-BIC). A fully analytic solution of the scattering problem as well as a condition for FP-BIC have been derived in the framework of the temporal coupled-mode theory.