Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 83: Poster: Enabling Technologies Sources of Quantum States of Light
FM 83.3: Poster
Donnerstag, 26. September 2019, 16:30–18:30, Tents
Towards demultiplexed photons from GaAs quantum dots for multi-photon interference experiments — •Julian Münzberg1, Maximilian Prilmüller1, Siamon Covre Da Silva2, Daniel Huber2, Markus Reindl2, Armando Rastelli2, Gregor Weihs1, and Robert Keil1 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria — 2Institute of Semiconductor and Solid State Physics, Johannes Kepler University, 4040 Linz, Austria
Bright sources of multiple indistinguishable photons are pivotal in experiments on boson sampling [1] and many-particle interference [2]. Demultiplexed photons collected from a quantum dot (QD) are a viable implementation of such a bright multi-photon source [1, 3-5]. In this work, we aim to use droplet-etched GaAs QDs [6] for single-photon generation. Preliminary characterization of the QDs yielded promising results and a setup for two-photon resonant excitation and collection is under construction. We plan to actively route consecutively emitted photons with freespace electro-optical modulators for polarisation rotation in conjunction with polarising beam splitters. These spatially separated photons will be eventually used for a multi-photon interference experiment in femtosecond laser written glass waveguides.
[1] Wang et al. Nat. Photonics 11, 361 (2017). [2] Giordani et al. Nat. Photonics 12, 173 (2018). [3] Lenzini et al. Laser Photonics Rev. 11, 1600297 (2017). [4] Hummel et al. arXiv:1903.08785 (2019). [5] Antón et al. arXiv:1905.00936 (2019). [6] Huber et al. PRL 121, 033902 (2018).