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HL: Halbleiterphysik

HL 58: Poster IIb

HL 58.18: Poster

Dienstag, 8. März 2005, 16:30–19:00, Poster TU F

Storing of arbitrary light pulses in resonant 1D photonic crystals — •Martin Schaarschmidt, Jens Förstner und Andreas Knorr — Institut für Theoretische Physik, Technische Universität Berlin, Germany

The considered 1D photonic crystal consists of semiconductor planes with localized excitons spaced at λ/2. The excitons couple dynamically to a propagating light pulse. Stationary (trapped) field distributions of this coupled system are numerically observed for resonant excitation inside the resonant photonic band gap. Within slowly varying envelope approximation analytic solutions based on the Maxwell-Bloch-Equations for these trapped light pulses are presented. It is shown that pulses of nearly arbitrary shape and intensity can exist as zero-velocity pulses inside an active photonic crystal. The preparation of a whole class of these pulses is demonstrated. In a similar system consisting of an InGaAs multiple quantum well with free excitons such solutions could not be found[1].

[1]Linear and nonlinear pulse propagation in a multiple-quantum-well photonic crystal, PRB 70 075306 (2004)