On demand single photon generation and coherent control of excitons from resonantly driven nanowire quantum dots

TL;DR

This paper demonstrates on-demand single-photon generation and coherent control of excitons in nanowire quantum dots, achieving low multi-photon probability and Rabi oscillations, advancing integrated quantum photonics.

Contribution

It reports the first successful resonant excitation of nanowire quantum dots with clear coherent control and low emission jitter, enabling integrated quantum photonic applications.

Findings

Single-photon purity with $g^{(2)}(0)$ below 0.1

Observation of Rabi oscillations indicating coherent control

Reduced emission time jitter under resonant excitation

Abstract

Coherent control of single photon sources is a key requirement for the advancement of photonic quantum technologies. Among them, nanowire-based quantum dot sources are popular due to their potential for on-chip hybrid integration. Here we demonstrate on-demand single-photon generation ($g^{(2)}(0)(X^{*}) =0.078$ and $g^{(2)}(0)(X)= 0.03$) from resonantly excited InAsP/InP nanowire quantum dots and observe Rabi oscillations in the dot emission, indicating successful coherent manipulation of the excitonic states in the nanowire. We also measure a low emission time jitter for resonant excitation as compared to above-band excitation. This work addresses the long-standing challenge of resonantly exciting nanowire-quantum dots. It paves the way for hybrid quantum photonic integration, enabling spin-photon entanglement and matter memories on-chip.