Department of Physics, Engineering Physics & Astronomy

Queen's University
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Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Quantum Optics of Self-Assembled Semiconductor Quantum Dots

Prof. Mark Fox
University of Sheffield

Thurs., July 17, 2014
10:30 AM @ Stirling 201

Abstract:

Self-assembled III-V semiconductor quantum dots form a near ideal system for exploring quantum-optical phenomena in the solid state. At the same time, the solid-state environment of the dot can lead to new physics that is not observed in atomic systems. In this seminar I shall first review experiments on the coherent control of excitons in InAs quantum dots by ultrafast laser pulses, with a particular emphasis on the effects of phonon coupling. I shall present very recent results that demonstrate excitonic population inversion in a single InAs quantum dot by off-resonant driving within the acoustic phonon sideband. In the second part of the seminar I shall discuss ways in which quantum dots can be incorporated into integrated quantum-optical circuits. Progress on developing spin-photon interfaces, on-chip beam-splitters and coherent single-photon sources will be reviewed. In these applications, the solid-state environment provides a scalable platform for implementing the devices, but also affects their performance through dephasing processes.