Electrically tunable single-photon source triggered by a monolithically integrated quantum dot microlaser
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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.
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 . DOI: 10.1021/acsphotonics.7b00119
© 2017, American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at pubs.acs.org / https://doi.org/10.1021/acsphotonics.7b00119
DescriptionThis 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).
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