Hybrid metal-dielectric nanocavity for enhanced light-matter interactions

TL;DR

This paper introduces a hybrid metal-dielectric nanocavity that significantly enhances light-matter interactions, featuring reduced mode volume, efficient emission, and broadband emission enhancement, advancing quantum photonics applications.

Contribution

It presents a novel hybrid nanocavity design with improved mode volume and emission properties in the InAs/GaAs platform, utilizing angled metal evaporation.

Findings

Reduced mode volume by an order of magnitude

Surface-emitting nanoscale cylindrical geometry

Strong broadband spontaneous emission enhancement (Purcell factor ~8)

Abstract

Despite tremendous advances in the fundamentals and applications of cavity quantum electrodynamics (CQED), investigations in this field have primarily been limited to optical cavities composed of purely dielectric materials. Here, we demonstrate a hybrid metal-dielectric nanocavity design and realize it in the InAs/GaAs quantum photonics platform utilizing angled rotational metal evaporation. Key features of our nanometallic light-matter interface include: (i) order of magnitude reduction in mode volume compared to that of leading photonic crystal CQED systems; (ii) surface-emitting nanoscale cylindrical geometry and therefore good collection efficiency; and finally (iii) strong and broadband spontaneous emission rate enhancement (Purcell factor ~ 8) of single photons. This light-matter interface may play an important role in quantum technologies.