Quantum Dots
In our research subgroup on Quantum Dots, we focus on three major goals:
(1) Develop novel excitation protocols to generate and coherently control the QD excited states, see our recent works [1-3]
(2) Generate time-bin entangled photon states from QDs [4-6]. To improve this and to get towards the deterministic generation of such states, we have recently started investigating the preparation of the biexciton state via dark exciton state in our ambitious FWF project AEQuDot, with Prof. Doris Reiter and Prof. Armando Rastelli, see [7,8] for the theoretical protocols.
(3) Designing and fabricating photonic cavity structures on QDs for high brightness single photons [9] for our multiphoton interference experiments in our FWF project FG5: Multiphoton Experiments with Quantum Dots with Prof. Armando Rastelli, Prof. Philipp Walther, and Prof. Barbara Kraus
(4) Designing quantum dot nanopillar structures to engineering collective effects like subradiance, towards understanding the energy trapping mechanisms in natural light-harvesting complexes in our latest FWF TAI project DarkEneT: Engineering Dark modes for Energy Trapping
We mostly work with InAs/GaAs quantum dots grown and/or provided by our various collaborators: D. Dalacu and P. Poole (NRC Ottawa), A. Rastelli (JKU Linz), and G. Solomon (Uni. Adelaide).
[1] Kappe et al., https://arxiv.org/abs/2209.08972
[2] Karli et al., https://pubs.acs.org/doi/10.1021/acs.nanolett.2c01783
[3] Bracht et al., https://arxiv.org/abs/2211.08176
[4] Jayakumar et al. https://doi.org/10.1038/ncomms5251
[5] Aumann et al. https://doi.org/10.1063/5.0081874
[6] Prilmueller et al. https://doi.org/10.1103/PhysRevLett.121.110503
[7] Lueker et al. https://doi.org/10.1103/PhysRevB.92.201305
[8] Neumann et al., https://doi.org/10.1103/PhysRevB.104.075428
[9] Liu et al., https://doi.org/10.1038/s41565-019-0435-9