Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 83: Poster: Enabling Technologies Sources of Quantum States of Light
FM 83.5: Poster
Donnerstag, 26. September 2019, 16:30–18:30, Tents
Tuning the Emission of Quantum Dots for Coupling to a Rb-Memory — Liang Zhai1, •Giang N. Nguyen1,2, Matthias C. Löbl1, Jan-Philipp Jahn1, Julian Ritzmann2, Andreas D. Wieck2, Armando Rastelli3, Arne Ludwig2, and Richard J. Warburton1 — 1University of Basel, 4056 Basel, Switzerland — 2Ruhr-Universität Bochum, 44780 Bochum, Germany — 3Johannes Kepler University Linz, 4040 Linz, Austria
Combining a solid-state quantum dot (QD) with an atomic memory is a promising hybrid-system for application in quantum communication [1]. Coupling the QD to a quantum memory, such as a Rb-memory, can circumvent the short coherence time of QDs. For coupling both systems, the photons emitted by the QD have to match the atomic ensemble in bandwidth and frequency [2,3].
We use droplet-etched GaAs QDs embedded in AlGaAs as a source of coherent single photons and present two different methods to match the Rb-frequency of 794 nm: Applying mechanical strain to the material [4] and applying an electric field to the QD which is embedded in a diode structure [5,6].
[1] N. Sangouard et al., Phys. Rev. A 76, 050301 (2007).
[2] J.-P. Jahn et al., Phys. Rev. B 92, 245439 (2015).
[3] L. Beguinet al., Phys. Rev. B 97, 205304 (2018).
[4] D. Huber et al., Phys. Rev. Lett. 121, 033902 (2018).
[5] L. Bouet et al., Appl. Phys. Lett. 105, 082111 (2014).
[6] F. Langer et al., Phys. Lett. 105, 081111 (2014).