Indistinguishablity from dephased emitters using combined plasmonic-dielectric cavities

TL;DR

This paper proposes a hybrid plasmonic-dielectric cavity system to produce indistinguishable photons from dephased emitters, reducing quality factor requirements and significantly increasing photon collection efficiency.

Contribution

It introduces a novel hybrid cavity architecture that combines plasmonic and dielectric components to improve photon indistinguishability and collection efficiency.

Findings

Outer cavity quality factor can be two orders of magnitude lower than traditional systems.

The hybrid design increases photon extraction efficiency by a factor of 12.

Partial direct coupling enhances overall system performance.

Abstract

The concept of cavity funneling has emerged recently as a promising route towards creating indistinguishable photons from highly dephased emitters. So far, all suggested solutions are solely based on dielectric cavities that require extremely high quality factors that are difficult to reach at visible wavelengths. Here we suggest a hybrid funneling architecture where a dephased emitter is coupled to a plasmonic nanoresonator that is enclosed by an outer dielectric cavity. The estimated lower limit of the outer cavity quality factor is found to be $\sim2$ orders of magnitude lower compared to a cascaded cavity system. Furthermore, the surrounding topology of our approach allows for a partial direct coupling between the emitter and the outer cavity which in turn can increase the overall system extraction efficiency $\left(\beta\right)$ by a factor of 12, boosting the probability of photon collection.