Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology

Q 16.17: Poster

Monday, March 17, 2014, 16:30–18:30, Spree-Palais

Towards resonance fluorescence from single GaAs/AlGaAs quantum dots at 780nm — •Robert Keil, Bianca Höfer, Jiaxiang Zhang, Eugenio Zallo, Fei Ding, and Oliver G. Schmidt — Institute for Integrative Nanosciences, IFW-Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany

Resonant excitation of the semiconductor quantum dots allows to initialize, manipulate and read out their spin states with reduced dephasing and photon-time-emission jitter [Vamivakas, Nat.Phys. (2012)], offering a promising approach for quantum communication applications, e.g. quantum repeaters. However, distinguishing the scattered photons from the equichromatic laser light remains a challenge. We are working on the resonance fuorescence with GaAs/AlGaAs quantum dots emitting at around 780 nm, using a polarization based laser suppression setup [Moelbjerg, Phys.Rev.Lett. (2012)]. The quantum dots were grown by molecular beam epitaxy infilling self-assembled nanoholes fabricated in situ by droplet etching [Atkinson J.Appl.Phys. (2012)]. And the wavelength of single quantum dots can be tuned exactly to 780.2nm by electro-mechanical tuning. The aim is to realize a hybrid interface between the single photons and the rubidium D2 transition line.