SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 7: Poster I
HL 7.66: Poster
Montag, 27. März 2023, 13:00–15:00, P2/EG
Near Fourier-Transform Limited Blinking Free Quantum Dots — •Eva Schöll1, Lukas Hanschke1, Melina Peter2, Ailton Garcia Jr.2, Patricia Kallert1, Francesco Salusti1, Saimon Filipe Covre da Silva2, Santanu Manna2, Armando Rastelli2, and Klaus D. Jöns1 — 1PhoQS, CeOPP, and Department of Physics, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany — 2Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, 4040 Linz, Austria
Tailored quantum light sources are crucial building blocks for applications in quantum technologies. Al droplet etched GaAs Quantum Dots are promising candidates for such sources, as they show very good characteristics for example in terms of single-photon purity, indistinguishability on short time scales and entanglement fidelity. However, these QDs usually exhibit an unstable charge environment, which leads to reduced coherence on long time scales, broadened linewidths and blinking. Embedding the QDs into a p-i-n diode structure enables energy tuning via the Stark effect and stabilizes the charge environment. Here we demonstrate a solid-state single-photon source with no signs of blinking on up to ms time scales and near Fourier-transform limited linewidths. This opens up possibilities for experiments for a fundamentally deeper understanding of quantum level schemes and realization towards a quantum network, where quantum interference between separate sources is required.