Upwind exciton-polariton propagation in hybrid photonic crystals

TL;DR

This paper theoretically investigates the axial spectral asymmetry and unidirectional exciton-polariton propagation in hybrid 1D multilayer photonic crystals with isotropic and anisotropic layers near semiconductor energy gaps.

Contribution

It introduces a theoretical model for exciton-polariton propagation in hybrid multilayer systems, revealing unidirectional propagation effects near electronic energy gaps.

Findings

Observation of axial spectral asymmetry in hybrid multilayer systems

Demonstration of unidirectional oblique exciton-polariton propagation

Development of a minimal two-layer model for tailoring propagation properties

Abstract

In this work we study theoretically the axial spectral asymmetry of a 1D periodic multilayer systems composed by hybrid two-layers (isotropic/anisotropic) and for photon energies close to the electronic energy gaps of semiconductors (excitons). The non-normal optical properties of these resonant non-magnetic photonic crystals, where linear and quadratic spatial dispersion effects are both present, will be computed in the framework of exciton-polariton by self-consistent Maxwell-Schroedinger equation solutions in the effective mass approximation. The tailoring of hybrid crystal, where exciton-polariton unidirectional oblique propagation is observed, will be computed by implementing a simple two-layers minimum model.