Indistinguishable photons from a diode

TL;DR

This paper demonstrates the generation of indistinguishable photons from a semiconductor diode with a quantum dot, using electrical control and energy filtering to achieve high-visibility two-photon interference.

Contribution

It introduces an all-electrical method to produce indistinguishable photons from a quantum dot diode, enhancing integration potential for quantum photonics.

Findings

Achieved 64% two-photon interference visibility

Controlled emission energy via Stark-shifting on sub-dephasing timescales

Demonstrated electrical excitation of indistinguishable photons

Abstract

We generate indistinguishable photons from a semiconductor diode containing a InAs/GaAs quantum dot. Using an all-electrical technique to populate and control a single-photon emitting state we filter-out dephasing by Stark-shifting the emission energy on timescales below the dephasing time of the state. Mixing consecutive photons on a beam-splitter we observe two-photon interference with a visibility of 64%.