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HL: Fachverband Halbleiterphysik

HL 35: Semiconductor Laser

HL 35.7: Vortrag

Mittwoch, 25. März 2009, 15:45–16:00, BEY 154

The Role of Decoupled Electron and Hole Dynamics in the Turn-on Behavior of Semiconductor Quantum-Dot Lasers — •Kathy Lüdge, Ermin Malić, and Eckehard Schöll — Institut für Theoretische Physik, Sekr. EW 7-1, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin

Quantum dot (QD) injection lasers are promising candidates for high-speed data transmission applications. However, so far their performance is hindered by low cuttoff frequencies. We show that mixed e-h Auger scattering events lead to separate dynamics for holes and electrons in the device. This decoupling is essential to explain the strong damping of the relaxation oscillations of the laser in excellent agreement with the experiment. For the numerical simulations we combine a microscopic approach for calculating the non-radiative scattering times and a rate equation model for simulating the complex dynamic turn-on behavior.