Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 85: Poster Session II

HL 85.88: Poster

Donnerstag, 17. März 2011, 18:00–21:00, P4

Influence of the inhomogeneous broadening of quantum dots in microcavity lasers — •Alexander Foerster and Jan Wiersig — Institut für Theoretische Physik, Universität Magdeburg

Microcavity lasers have recently attracted a considerable interest in semiconductor physics. Previous models [1] ignored the inhomogeneous broadening of quantum dots, i.e. they used the assumptions of identical quantum dots in resonance with the laser mode. Here we present a microscopic theory, which accounts for the energetic detuning of the different quantum dots. We use a four level laser model based on the cluster expansion method.

The impact of inhomogeneous broadened quantum dots on various properties of the laser is studied. The contribution of each quantum dot in the system is analysed. With increasing detuning a shift in the Input-Output characteristics becomes visible.

[1] C. Gies, J. Wiersig, M. Lorke, and F. Jahnke, Phys. Rev. A 75, 013803 (2007)