Related Experiment Video
Updated: May 27, 2026
Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Coalescence of single photons emitted by disparate single-photon sources: the example of InAs quantum dots and
Sergey V Polyakov1, Andreas Muller, Edward B Flagg
1Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland, USA.
Abstract:
Single photons produced by fundamentally dissimilar physical processes will in general not be indistinguishable. We show how photons produced from a quantum dot and by parametric down-conversion in a nonlinear crystal can be manipulated to be indistinguishable. The measured two-photon coalescence probability is 16%, and is limited by quantum-dot decoherence. Temporal filtering to the quantum-dot coherence time and accounting for detector time response increases this to 61% while retaining 25% of the events. This technique can connect different elements in a scalable quantum network.
