Metal-coated nano-cylinder cavity for broadband nonclassical light emission

TL;DR

This paper introduces a metal-coated nanocylinder cavity design that enhances broadband non-classical light emission, offering high collection efficiency and Purcell factors, advancing solid-state quantum light sources.

Contribution

It presents a novel nanocylinder cavity architecture compatible with III-V GaInAs technology, achieving broadband enhancement and robustness for non-classical light emission.

Findings

Achieves >45% collection efficiency

Provides Purcell factors >15 over 80 nm spectral range

Low sensitivity to emitter-cavity spatial mismatch

Abstract

A novel metal-coated nanocylinder-cavity architecture fully compatible with III-V GaInAs technology and benefiting from a broad spectral range enhancement of the localdensity- of-states is proposed as an integrated source of non-classical light. Due to a judicious selection of the mode volume, the cavity combines good collection efficiency (\gg 45%), large Purcell factors (\gg 15) over a 80-nm spectral range, and a low sensitivity to inevitable spatial mismatches between the single emitter and the cavity mode. This represents a decisive step towards the implementation of reliable solid-state devices for the generation of entangled photon pairs at infrared wavelengths.