Interference with a Quantum Dot Single-Photon Source and a Laser at Telecom Wavelength

TL;DR

This paper demonstrates quantum interference between telecom-wavelength photons from a quantum dot and a laser, advancing quantum communication technologies by operating at standard telecommunication wavelengths.

Contribution

First demonstration of quantum interference between a quantum dot single-photon source and a laser at telecom wavelengths, showing high photon indistinguishability.

Findings

Good agreement with theoretical model

High degree of photon indistinguishability

Progress towards quantum communication applications

Abstract

The interference of photons emitted by dissimilar sources is an essential requirement for a wide range of photonic quantum information applications. Many of these applications are in quantum communications and need to operate at standard telecommunication wavelengths to minimize the impact of photon losses and be compatible with existing infrastructure. Here we demonstrate for the first time the quantum interference of telecom-wavelength photons from an InAs/GaAs quantum dot single-photon source and a laser; an important step towards such applications. The results are in good agreement with a theoretical model, indicating a high degree of indistinguishability for the interfering photons.