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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.50: Poster

Monday, March 27, 2023, 13:00–15:00, P2/EG

Swing-Up Dynamics in Quantum Dot Cavity Systems — •Nils Heinisch, Nikolas Köcher, David Bauch, and Stefan Schumacher — Physics Department and CeOPP, Paderborn University, Germany

In this work, we further investigate the recently proposed [1] and experimentally demonstrated [2] SUPER-scheme (Swing-UP of the quantum EmitteR population). In the SUPER-scheme optical excitation of a quantum emitter is achieved using two off-resonant red-detuned Gaussian pulses. Here, we expand the studies to quantum dot cavity systems and aim for high quality photons, generated during the decay process following the excitation. After successful proof-of-principle studies with a two-level system, we present the successful single-photon and photon-pair generation using the SUPER-scheme for excitation of diamond-shaped exciton-biexciton quantum dot model systems. For a more realistic simulation we also take phonons into account. For all systems studied it can be concluded that a cavity neither hinders the swing-up process nor degrades the quality of the generated photons which is in contrast to excitation schemes using resonant Gaussian pulses. [1] T. K. Bracht et al., PRX Quantum 2, 040354 (2021). [2] Y. Karli et al., Nano Letters 22, 6567 (2022).