Electrically tunable single-photon source triggered by a monolithically integrated quantum dot microlaser
Abstract
We report on a quantum dot micropillar-based single-photon source demonstrating tunable emission energy via an applied electric field and driven by an on-chip, high-β, whispering-gallery-mode microlaser. The cavity-enhanced single-photon source is monolithically integrated with an electrically driven, coherent excitation source. The device concept features low laser-threshold currents of a few tens of µA, has a small footprint with a device area of ≅ 200 µm2 and demonstrates high single-photon purity with g(2)(0) as low as 0.07 ± 0.03 under pulsed electrical excitation of the microlaser. The electric field applied along the growth direction of the single-photon emitter allows the emission to be tuned by up to 1.1 meV via the quantum-confined Stark effect, bringing it into resonance with the fundamental mode of the surrounding micropillar resonator for enhanced emission via the Purcell effect.
Citation
Munnelly , P , Heindel , T , Thoma , A , Kamp , M , Höfling , S , Schneider , C & Reitzenstein , S 2017 , ' Electrically tunable single-photon source triggered by a monolithically integrated quantum dot microlaser ' , ACS Photonics , vol. 4 , no. 4 , pp. 790-794 . https://doi.org/10.1021/acsphotonics.7b00119
Publication
ACS Photonics
Status
Peer reviewed
ISSN
2330-4022Type
Journal article
Description
This work was supported by the German Research Foundation (DFG) under Grant Nos. RE2974=9 - 1 and SCHN1376=1-1 and the German Federal Ministry of Education and Research (BMBF) for support through the VIP-project QSOURCE (Grant No. 03V0630).Collections
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