Phase evolution of solitonlike optical pulses during excitonic Rabi flopping in a semiconductor.
We demonstrate that the temporal pulse phase remains essentially unaltered before separate phase characteristics are developed when propagating high-intensity pulses coherently on the exciton resonance of an optically thick semiconductor. This behavior is a clear manifestation of self-induced transmission and pulse breakup into soliton-like pulses due to Rabi flopping of the carrier density. Experiments using a novel fast-scan cross-correlation frequency-resolved optical gating (XFROG) method are in good agreement with numerical calculations based on the semiconductor Bloch equations.
Nielsen
N C
NC
Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany. n.nielsen@fkf.mpg.de
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