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HL: Fachverband Halbleiterphysik
HL 24: Quantum dots: Optics
HL 24.5: Vortrag
Mittwoch, 29. März 2023, 10:30–10:45, POT 151
Towards deterministic generation of time-bin entangled photons from GaAs quantum dots — •Florian Kappe1, Yusuf Karli1, Thomas Bracht2, Saimon Covre da Silva3, Armando Rastelli3, Vikas Remesh1, Doris Reiter2,4, and Gregor Weihs1 — 1Institut für Experimentalphysik, Universität Innsbruck, Innsbruck, Austria — 2Institut für Festkörpertheorie, WWU Münster, Münster, Germany — 3Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria — 4Condensed Matter Theory, TU Dortmund, Dortmund, Germany
Semiconductor quantum dots are bright, on-demand single photon sources suitable for realising quantum communication devices. Here, we present our first results towards the deterministic generation of time-bin entangled photon states via dark exciton states from GaAs/AlGaAs quantum dots. Our schemes employ chirped laser pulses and an external magnetic field that enables the coupling of bright and dark exciton states in the quantum dot [1,2]. Based on numerical methods we analyze the quantum dot dynamics and state preparation fidelity and identify that the preparation schemes are quite robust against the phonon influence.
[1] Phys. Rev. B. 92(20), (2015). [2] Phys. Rev. B 104.7 (2021).