Resonant Bragg quantum wells in hybrid photonic crystals

TL;DR

This paper investigates exciton-polariton propagation in resonant hybrid photonic crystals with anisotropic layers, demonstrating how in-plane anisotropy influences optical properties and potential light-trapping applications.

Contribution

It introduces a novel class of resonant Bragg structures with tunable in-plane anisotropy affecting exciton-polariton dispersion and optical band gaps.

Findings

Intermediate dispersion curves are highly dependent on in-plane anisotropy.

Structural periodicity influences photonic band gap and radiation-matter coupling.

Potential for designing new light-trapping optical devices.

Abstract

The exciton-polariton propagation in resonant hybrid (isotropic/anisotropic) periodic stacks, with misaligned in plane anisotropy and Bragg photon frequency in resonance with Wannier exciton of 2D quantum wells, is studied by self-consistent theory and in the effective mass approximation. The optical tailoring of this new class of resonant Bragg re ectors, where the structural periodicity of a multi-layer drives the periodicity of the in-plane optical ^ C axis orientation, is computed for symmetric and non-symmetric elementary cell by conserving strong radiation-matter coupling and photonic band gap. We will demonstrate, by selected numerical examples, that the behavior of the so called intermediate dispersion curves (IDC), that drop between upper and lower branches of the lowest energy band gap, are strongly dependent from in-plane ^ C axis orientation. Therefore, we guess that this class of hybrid meta-materials is promising for new trapping light optical devices based on IDC behavior.