Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 54: Quantum light sources based on solid state systems: Status and visions II (Focus session with TT)

HL 54.2: Vortrag

Dienstag, 1. April 2014, 14:30–14:45, POT 251

Indistinguishable single photons from quasi-resonantly pumped quantum dots in adiabatic micropillar cavities — •Sebastian Unsleber1, Michael Dambach1, Matthias Lermer1, Sven Höfling1,2, Christian Schneider1, and Martin Kamp11Technische 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

Single, indistinguishable photons are very important for applications in quantum networks and communication as well as linear optical quantum computing. Due to their atom-like emission properties quantum dots are promising candidates for photon sources matching this characteristics. Furthermore quantum dots can be implemented in nanostructured waveguides and microcavities leading to higher emission rates of single, indistinguishable photons.

We report on the emission of single and indistinguishable photons generated from quantum dots under quasi-resonant excitaion. The quantum dots are implemented in a adiabatic cavity design where we applied Bloch-wave engeneering to realize submicron diameter high quality factor GaAs/AlAs micropillars. Single photons emission with g(2)(0)-values as low as 0.036 are observed and quantum interference of the quantum dots leads to visibility as high as 76%. Furthermore we studied the influence of the quantum dot cavity detuning on the indistinguishability of the emitted photons.

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