On-chip single photon emission from an integrated semiconductor quantum dot into a photonic crystal waveguide

TL;DR

This paper reports the integration of a semiconductor quantum dot into a photonic crystal waveguide, enabling efficient on-chip single photon emission with enhanced spontaneous emission rates, advancing quantum photonic circuit development.

Contribution

The work demonstrates the first on-chip single photon source from a quantum dot integrated into a photonic crystal waveguide with Purcell enhancement.

Findings

Single photon emission rate of up to 19 MHz

Device efficiency of 24%

Sub-Poissonian photon statistics

Abstract

We demonstrate the in-plane emission of highly-polarized single photons from an InAs quantum dot embedded into a photonic crystal waveguide. The spontaneous emission rates are Purcell-enhanced by the coupling of the quantum dot to a slow-light mode of the waveguide. Photon-correlation measurements confirm the sub-Poissonian statistics of the in-plane emission. Under optical pulse excitation, single photon emission rates of up to 19 MHz into the guided mode are demonstrated, which corresponds to a device efficiency of 24%. These results herald the monolithic integration of sources in photonic quantum circuits.