Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics III
Q 42.49: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
Cold atom-semiconductor hybrid quantum system — •Janik Wolters1, Lucas Béguin1, Fei Ding2, Aline Faber1, Jan-Philipp Jahn1, Andreas Jöckel1, Andreas Kuhlmann1, Mathieu Munsch1, Armando Rastelli3, Nicolas Sangouard1, Oliver G. Schmidt2, Philipp Treutlein1, and Richard J. Warburton1 — 1Universität Basel, Departement Physik, CH-4056 Basel — 2IFW Dresden, Germany — 3Johannes-Kepler University Linz, Austria
Semiconductor quantum dots are excellent single-photon sources, providing triggered single-photon emission at a high rate and with high spectral purity. Independently, atomic ensembles have emerged as one of the best quantum memories for single photons, providing high efficiency storage and long memory lifetimes. In this project, we combine these two disparate physical systems to exploit the best features from both worlds. On the one hand, we have characterized a new type of self-assembled GaAs/AlGaAs quantum dots that emit narrow-band single-photons (Δ ν ∼ 1 GHz) at Rb wavelengths. Fine tuning of the photon frequency is achieved via strain. This allows performing spectroscopy of the Rb D2-line at the single-photon level, proving the addressability the different hyperfine transitions [1]. On the other hand, detailed theory of an EIT-based memory scheme in a dense ultracold ensemble of 87Rb atoms (OD ∼ 1000) was developed [2]. In the long term, such a memory will form the basis for experiments on hybrid entanglement and quantum networks.
[1] J.-P. Jahn et al., arXiv:1508.06461 (2015).
[2] M. T. Rakher et al., Phys. Rev. A 88 053834 (2013).