Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.108: Poster

Monday, March 23, 2009, 14:30–17:00, P2

Pulse propagation in Quantum Dot Semiconductor Optical Amplifiers — •Niels Majer, Miriam Wegert, Ermin Malic, Kathy Lüdge, and Eckehard Schöll — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin

We investigate pulse propagation in quantum dot semiconductor optical amplifiers (QD SOA) using travelling wave equations for the electric field amplitude on the basis of Maxwell's equations coupled with Semiconductor Bloch equations. The model includes microscopically calculated Coulomb scattering rates in the dynamic equations for the carrier populations of the quantum dots, and a phenomenological dephasing time.

Simulations of the spatiotemporal dynamics of the system using ultrashort (150 fs FWHM) input pulses reveal the following intensity-dependent effects: As the pulse travels along the SOA, it is deformed and may even develop a two-peak structure (pulse-breakup).