Ultrafast electrical control of a resonantly driven single photon source

TL;DR

This paper demonstrates ultrafast electrical control of a quantum dot single photon source, achieving high-quality, narrow bandwidth photon emission with reduced multi-photon probability under resonant excitation.

Contribution

It introduces a method for electrically triggering single photons from a quantum dot with high repetition rate and spectral filtering, advancing quantum photonics technology.

Findings

Single photon emission probability reduced to 97.2%.

Electrical pulses enable ultrafast control of photon generation.

Resonant excitation filters charge noise, producing narrow bandwidth photons.

Abstract

We demonstrate generation of a pulsed stream of electrically triggered single photons in resonance fluorescence, by applying high frequency electrical pulses to a single quantum dot in a p-i-n diode under resonant laser excitation. Single photon emission was verifed, with the probability of multiple photon emission reduced to 2.8%. We show that despite the presence of charge noise in the emission spectrum of the dot, resonant excitation acts as a filter to generate narrow bandwidth photons.