Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 97: Quantum dots and wires: Pillars and cavities
HL 97.2: Vortrag
Freitag, 20. März 2015, 09:45–10:00, ER 164
Light matter coupling between a site controlled quantum dot and a resonant laser field — •Sebastian Unsleber1, Michael Dambach1, Sebastian Maier1, Sven Höfling2, Christian Schneider1, and Martin Kamp1 — 1Technische Physik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany — 2Present address: SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom
Many new applications in the field of quantum information technology and photonics require single and indistinguishable photons. Since quantum dots act inherently as emitters of such photons, they are basically predestinated for this schemes. A much higher scalability can be achieved if these quantum dots have a controlled nucleation position. Furthermore, the indistinguishability of the emitted photons is directly linked to their coherence properties, which means that the quantum dot should be excited resonantly in order to suppress e.g. spectral diffusion and time-jitter effects. As a step towards the generation of indistinguishable photons out of resonantly pumped site controlled quantum dots, we present in this work fundamental effects that occur for the coupling of the QD-exciton to the driving laser field. This coupling splits the two excitonic states into four dressed states. Transitions between these states give rise to the well-known Mollow-triplet. Furthermore, we investigate the temperature depended splitting of the two sidepeaks and their dephasing properties.