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

Single-photon sources based on InP quantum dots

Christian Kessler
University of Stuttgart

Thurs, Oct. 24, 2013
10:30 AM @ Stirling 401


Single photons on demand are highly desirable sources for future applications in quantum communication. Semiconductor quantum dots are a promising approach to realize compact and efficient single photon sources due to their tailorable emission energy, small emission linewidth and their ease of integrability with devices. To operate an electrically driven device with high repetition rates the influence of several excitation parameters on the emission properties has to be investigated and a detailed understanding of the underlying physical processes on a microscopic level is essential. This talk will discuss some of our recent progress on understanding the purity of pulse-excited single photons using micro-electroluminescence and photon-statistics measurements [1].

[1] C. A. Kessler et al., Strong antibunching from electrically driven devices with long pulses: A regime for quantum-dot single-photon generation, Phys. Rev. B. 86, 115326 (2012).