Purcell enhancement of single-photon emitters in silicon

TL;DR

This paper demonstrates a scalable quantum interface by integrating erbium dopants into silicon nanophotonic resonators, achieving high Purcell enhancement and coherent single-photon emission suitable for quantum networks.

Contribution

It introduces a novel platform combining erbium dopants with silicon resonators, enabling efficient spin-photon coupling at telecom wavelengths.

Findings

78-fold Purcell enhancement of single-photon emission

Spectrally stable spin-resolved excitation with < 0.1 GHz linewidth

Observation of optical Rabi oscillations

Abstract

Individual spins that are coupled to telecommunication photons offer unique promise for distributed quantum information processing once a coherent and efficient spin-photon interface can be fabricated at scale. We implement such an interface by integrating erbium dopants into a nanophotonic silicon resonator. We achieve spin-resolved excitation of individual emitters with < 0.1 GHz spectral diffusion linewidth. Upon resonant driving, we observe optical Rabi oscillations and single-photon emission with a 78-fold Purcell enhancement. Our results establish a promising new platform for quantum networks.