Regensburg 2010 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 48: Semiconductor Lasers

HL 48.1: Talk

Thursday, March 25, 2010, 09:30–09:45, H13

Dynamic Properties of Quantum Dot Semiconductor Optical Amplifiers — •Niels Majer, Miriam Wegert, Kathy Lüdge, and Eckehard Schöll — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

We investigate the dynamic properties of quantum dot semiconductor optical amplifiers (QD-SOAs) on the basis of Bloch equations for the coupled interband polarization and carrier dynamics of the QDs along with a travelling wave type field equation for the electric field within the device. The model includes microscopically calculated Coulomb scattering rates in the dynamic equations for the carrier populations of the quantum dots.

Pump-probe simulations using ultrashort input pulses (∼150 fs) give insight into the (ultra-) fast gain recovery dynamics of QD-SOAs, whereas the propagation dynamics of ultrashort input pulses reveals coherent effects such as pulse breakup.