Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 65: Quantum Dots: Optical Properties II (organized by HL)
TT 65.4: Talk
Wednesday, April 2, 2014, 12:15–12:30, POT 251
Robust population inversion using an excitonic V-type three level system in a single InGaAs quantum dot — •Dirk Mantei1, Jens Förstner1, Simon Gordon1, Yves Alexander Leier1, Ashish Kumar Rai2, Dirk Reuter1, Andreas D. Wieck2, and Artur Zrenner1 — 1Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 2Ruhr-Universität Bochum, Universitätsstraße 150, Gebäude NB, 44780 Bochum, Germany
For the optical manipulation of a single quantum system, diverse approaches such as Rabi Oscillations and the Adiabatic Rapid Passage are well established techniques. For instance they are used to realize quantum gates or single photon sources. To achieve an inversion as complete as possible we present a new possibility by examining a single quantum system with V-type three level scheme, a common ground state and two distinguishable and separately excitable transitions. Their sequential, pulsed excitation allows for the preparation of a robust, fault-tolerant and phase-insensitive inversion. We experimentally demonstrate and theoretically describe this concept, which is based on the polarization-selective excitation of a fine structure split exciton ground state in a single InGaAs quantum.