Physical Review A

Observation of optical precursors at pulse propagation in GaAs

Jaak Aaviksoo, J. Kühl, Klaus Ploog

Published Nov 1, 1991• 79 citations

Abstract

We have observed optical precursors by studying propagation of ultrashort optical pulses with a steeply rising and an exponentially decaying trailing edge through a 0.2-\ensuremath{\mu}m-thick GaAs crystal near the exciton resonance. The appearance of a fast pulse front---the precursor---independent of the detuning with respect to the resonance, was accompanied by a delayed main pulse. The delay of the main pulse varies with detuning in according with theoretical predictions.

DOI: 10.1103/physreva.44.r5353

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