Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 56: Focus Session: Quantum Nanophotonics in Solid State Systems II (joint session HL/TT)

TT 56.2: Talk

Wednesday, March 14, 2018, 10:00–10:15, EW 201

Time reordering of paired photons through two-photon strong coupling and generation of maximally entangled states in quantum dots — •Samir Bounouar¹, Christoph De La Haye¹, Max Strauss¹, Peter Schnauber¹, Alexander Thoma¹, Manuel Gschrey¹, Jan-Hindrik Schulze¹, Andre Strittmatter², Sven Rodt¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany — ²Abteilung für Halbleiterepitaxie, Otto-von-Guericke, Universität, 39106 Magdeburg, Germany

We show that strong coupling of a continuous laser field to the exciton-biexciton radiative cascade of a semiconductor quantum dot (QD) allows for the observation of the dressed states and the manipulation of the paired photons time ordering [1]. Moreover, two-photon Rabi oscillations of the dressed states population, due to the non-linear coherent driving of the radiative cascade, confirm the coherent nature of the two-photon driving. We also show that maximally entangled states can be efficiently generated from microlens-QD with non-zero fine structure splitting and that their fidelity to the Bell states remains unaffected by the decoherence over the full wave-packet [2].

[1] S. Bounouar et al., Phys. Rev. Lett. 118, 233601 (2017). [2] S. Bounouar et al., (in preparation).