Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 49: Quantum Dots: Optical Properties III

HL 49.5: Talk

Wednesday, March 22, 2017, 10:30–10:45, POT 151

Time reordering of paired photons in a dressed three-level cascade — •Samir Bounouar, Max Strauß, Alexander Carmele, Peter Schnauber, Alexander Thoma, Manuel Gschrey, Jan-Hindrik Schulze, André Strittmatter, Sven Rodt, Andreas Knorr, and Stephan Reitzenstein — Technische Universität, Berlin, Deutschland

We present the two-photon coherent control over a ladder-type three level system (ground state, exciton, biexciton in a quantum dot) at the level of single photons and single photon pairs through photon correlation spectroscopy. By collecting the photons coming from the different dressed states and by correlating them, we show that strong coupling of the laser field to the radiative cascade allows for the manipulation of the paired photons time ordering. Such an operation is crucial for the on-demand production of entangled photons "across" generation [1]. Moreover, two-photon Rabi oscillations of the dressed states population, due to the non-linear coherent driving of the radiative cascade, are observed. We also show that the single dressed states emission can be operated as a widely tunable single photon source without need of additional piezo-tuning techniques [2].

[1] J. E. Avron, Phys. Rev. Lett. 100, 120501 (2008), [2] S. Bounouar et al., arXiv:1610.08268v1 (2016).