A Robust Coherent Single-Photon Interface for Moderate- NA Optics Based on SiV Center in Nanodiamonds and a Plasmonic Bullseye Antenna

TL;DR

This paper presents a hybrid quantum photonics platform combining SiV centers in nanodiamonds with a plasmonic bullseye antenna, enabling efficient coherent single-photon exchange with low-NA optics and robustness to misalignment.

Contribution

It introduces a novel hybrid platform that enhances coherent photon exchange efficiency and alignment robustness in quantum optics applications.

Findings

Achieved efficient single-photon interface with low numerical aperture optics.

Demonstrated inherent resistance to misalignment in the hybrid system.

Showed potential for practical quantum photonics implementations.

Abstract

Coherent exchange of single photons is at the heart of applied Quantum Optics. The negatively-charged silicon vacancy center in diamond is among most promising sources for coherent single photons. Its large Debye-Waller factor, short lifetime and extraordinary spectral stability is unique in the field of solid-state single photon sources. However, the excitation and detection of individual centers requires high numerical aperture optics which, combined with the need for cryogenic temperatures, puts technical overhead on experimental realizations. Here, we investigate a hybrid quantum photonics platform based on silicon-vacancy center in nanodiamonds and metallic bullseye antenna to realize a coherent single-photon interface that operates efficiently down to low numerical aperture optics with an inherent resistance to misalignment.