Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 107: Quantum Information Systems II (organized by HL)

TT 107.1: Talk

Friday, April 4, 2014, 09:30–09:45, POT 151

Coherent pulse re-shaping in a semiconductor optical amplifier — •Mitra Pasche, Mirco Kolarczik, Yücel Kaptan, Nina Owschimikow, and Ulrike Woggon — Institut für Optik und Atomare Physik, Technische Universität Berlin, Germany

Recently it was demonstrated that Rabi oscillations in Quantum Dots (QDS) induce a laser pulse re-shaping in a semiconductor optical amplifier (SOA) at room temperature[1]. Here we present the results of a systematic investigation of the dependence of the pulse re-shaping on pulse power, detuning and the electrical injection level. The measurements are performed using frequency resolved optical short-pulse characterization by heterodyning (FROSCH)[1]. The method allows to observe simultaneously the amplitude and phase of the light field of the laser pulse relative to a reference pulse. In numerical simulations, we vary the parameters of the probe pulse and quantify their influence on the shape of the cross-correlation of the probe and reference pulse. We can thus assign characteristic phase jumps observed in the experiment to a coherent exchange of energy in the light-matter system.

[1] M.Kolarczik, N.Owschimikow, J.Korn, B.Lingnau, Y.Kaptan, D.Bimberg, E.Schöll, K.Lüdge, U.Woggon, Nat. Commun., accepted (2013).