Exciton-polaritons in GaAsbased slab waveguide photonic crystals

Abstract

We report the observation of band gaps for low loss exciton-polaritons propagating outside the light cone in GaAs-based planar waveguides patterned into two-dimensional photonic crystals. By etching square lattice arrays of shallow holes into the uppermost layer of our structure, we open gaps on the order of 10 meV in the photonic mode dispersion, whose size and light-matter composition can be tuned by proximity to the strongly coupled exciton resonance. We demonstrate gaps ranging from almost fully photonic to highly excitonic. Opening a gap in the exciton-dominated part of the polariton spectrum is a promising first step towards the realization of quantum-Hall-like states arising from topologically nontrivial hybridization of excitons and photons.

published in Appl. Phys. Lett. in 2021

References in corpus (5)

• Topological Polaritons
• Propagation and amplification dynamics of 1D polariton condensates
• Metasurface Integrated Monolayer Exciton Polariton
• Quantum theory of exciton-photon coupling in photonic crystal slabs with embedded quantum wells
• Angular dependence of giant Zeeman effect for semi-magnetic cavity polaritons

Cited by in corpus (1)

• Theory of photonic crystal polaritons in periodically patterned multilayer waveguides