An electrically driven cavity-enhanced source of indistinguishable photons with 61% overall efficiency

A. Schlehahn, A. Thoma, P. Munnelly, M. Kamp, Sven Höfling, T. Heindel, C. Schneider, S. Reitzenstein

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37 Citations (Scopus)

Abstract

We report on an electrically driven efficient source of indistinguishable photons operated at pulse-repetition rates f up to 1.2 GHz. The quantum light source is based on a p-i-n-doped micropillar cavity with integrated self-organized quantum dots, which exploits cavity quantum electrodynamics effects in the weak coupling regime to enhance the emission of a single quantum emitter coupled to the cavity mode. We achieve an overall single-photon extraction efficiency of (61 ± 11) % for a device triggered electrically at f = 625 MHz. Analyzing the suppression of multi-photon emission events as a function of excitation repetition rate, we observe single-photon emission associated with g(2)HBT(0) values between 0.076 and 0.227 for f ranging from 373 MHz to 1.2 GHz. Hong-Ou-Mandel-type two-photon interference experiments under pulsed current injection at 487 MHz reveal a photon-indistinguishability of (41.1 ± 9.5) % at a single-photon emission rate of (92 ± 23) MHz.
Original languageEnglish
Article number011301
Number of pages6
JournalAPL Photonics
Volume1
Issue number1
DOIs
Publication statusPublished - 18 Apr 2016

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