Tailoring Light-Matter Interaction with a Nanoscale Plasmon Resonator

TL;DR

This paper introduces a nanoscale plasmon resonator using crystalline silver nanowires and dielectric DBRs, achieving strong light-matter interaction, high emission enhancement, and narrowband single-photon emission.

Contribution

It presents a novel plasmon resonator design with ultra-small mode volume and high Q-factor, enabling significant spontaneous emission enhancement and spectral control.

Findings

Emission rate enhanced by over 75 times

Resonator mode volume two orders of magnitude below diffraction limit

Converted broadband emitters into narrowband single-photon sources

Abstract

We propose and demonstrate a new approach for achieving strong light-matter interactions with quantum emitters. Our approach makes use of a plasmon resonator composed of defect-free, highly crystalline silver nanowires surrounded by patterned dielectric distributed Bragg reflectors (DBRs). These resonators have an effective mode volume (Veff) two orders of magnitude below the diffraction limit and quality factor (Q) approaching 100, enabling enhancement of spontaneous emission rates by a factor exceeding 75 at the cavity resonance. We also show that these resonators can be used to convert a broadband quantum emitter to a narrowband single-photon source with color-selective emission enhancement.