A Semiconductor Topological Photonic Ring Resonator

TL;DR

This paper demonstrates a micron-scale GaAs topological photonic ring resonator utilizing edge states in a topological photonic crystal, with embedded quantum dots used to probe and control the mode structure for quantum photonics applications.

Contribution

It introduces a topological photonic ring resonator with embedded quantum dots, enabling mode control and paving the way for integrated quantum photonics devices.

Findings

Successful fabrication of a topological photonic ring resonator

Mapping of mode profiles using embedded quantum dots

Control of mode confinement via lattice parameter tuning

Abstract

Unidirectional photonic edge states arise at the interface between two topologically-distinct photonic crystals. Here, we demonstrate a micron-scale GaAs photonic ring resonator, created using a spin Hall-type topological photonic crystal waveguide. Embedded InGaAs quantum dots are used to probe the mode structure of the device. We map the spatial profile of the resonator modes, and demonstrate control of the mode confinement through tuning of the photonic crystal lattice parameters. The intrinsic chirality of the edge states makes them of interest for applications in integrated quantum photonics, and the resonator represents an important building block towards the development of such devices with embedded quantum emitters.