Deterministic generation of bright single resonance fluorescence photons from a Purcell-enhanced quantum dot-micropillar system

TL;DR

This paper demonstrates a method for deterministic, bright single-photon generation using a Purcell-enhanced quantum dot-micropillar system, achieving high efficiency and observing Rabi oscillations under pulsed resonance fluorescence.

Contribution

It introduces a quantum dot-micropillar system that enables deterministic single-photon emission with high efficiency and observes Rabi oscillations, advancing quantum light source technology.

Findings

Single photon extraction efficiency of 20.7% per polarization

Overall extraction efficiency of 41.4%

Observation of Rabi oscillations in the system

Abstract

We report on the observation of bright emission of single photons under pulsed resonance fluorescence conditions from a single quantum dot (QD) in a micropillar cavity. The brightness of the QD fluorescence is greatly enhanced via the coupling to the fundamental mode of a micropillar, allowing us to determine a single photon extraction efficiency of $(20.7\pm0.8)~\%$ per linear polarization basis. This yields an overall extraction efficiency of $(41.4\pm1.5)~\%$ in our device. We observe the first Rabi-oscillation in a weakly coupled quantum dot-micropillar system under coherent pulsed optical excitation, which enables us to deterministically populate the excited QD state. In this configuration, we probe the single photon statistics of the device yielding $g^{(2)}(0)=0.072\pm0.011$ at a QD-cavity detuning of $75~\mu$eV.