Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 26: Quantum Dots and Wires 5: Optics 2

HL 26.11: Talk

Thursday, September 8, 2022, 12:30–12:45, H32

Spin control of single spins in semiconductor quantum dots placed in a microcavity — •Marco De Gregorio, Tobias Huber, and Sven Höfling — Technische Physik, Julius-Maximilians-Universität, Würzburg, Deutschland

Implementation of secure communication with entangled photons is a continuously evolving field. Different platforms have been investigated during the last decades and quantum dots have been proven to be a promising candidate as source for entangled photons. Despite their deterministic photon creation and excellent multi-photon suppression, quantum dot sources suffer from outcoupling efficiencies, when not embedded into photonic structures. Here, we present a low quality factor micropillar cavity, which is broadband, but still enhances the photon extraction efficiency. Analysis of deterministically placed low-q micropillars, characterization and optimization of the emission behavior and control of the spin are necessary steps paving the way towards the generation of a quantum repeater.