Realization of two Fourier-limited solid-state single-photon sources

TL;DR

This paper demonstrates two solid-state single-photon sources with indistinguishable photons by combining high-resolution spectroscopy and Stark tuning, enabling advanced quantum interference experiments.

Contribution

It introduces a method to produce spectrally overlapped single photons from independent solid-state sources using Stark effect tuning.

Findings

Successful generation of indistinguishable single photons from two separate sources

Use of Stark effect to precisely tune molecular transition frequencies

Establishment of a platform for quantum interference experiments

Abstract

We demonstrate two solid-state sources of indistinguishable single photons. High resolution laser spectroscopy and optical microscopy were combined at T = 1.4 K to identify individual molecules in two independent microscopes. The Stark effect was exploited to shift the transition frequency of a given molecule and thus obtain single photon sources with perfect spectral overlap. Our experimental arrangement sets the ground for the realization of various quantum interference and information processing experiments.