Time resolved excitonic coherent polarization dynamics in GaAs multiple quantum wells

Details Time resolved excitonic coherent polarization dynamics in GaAs multiple quantum wells Time resolved excitonic coherent polarization dynamics in GaAs multiple quantum wells

2003-06-23

arxiv.org/abs/cond-mat/0306571v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.205331

We investigate pump induced modulation in the temporal evolution of the excitonic coherent polarization generated by a probe pulse in GaAs multiple quantum wells. For this, we perform fs time resolved pump-probe reflectivity measurements using frequency upconversion at both positive and negative pump-probe delays. A contribution arising from interference of excitonic linear and nonlinear polarization, which is usually not considered in describing pump-probe experiments, is required to understand the results.

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