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1995
Journal Article
Titel
Coherent dynamics of excitonic and biexcitonic wave packets in semiconductor superlattices
Alternative
Kohärente Dynamik von exzitonischen und biexzitonischen Wellenpaketen in Halbleiterübergittern
Abstract
We report on the observation of an electric-field-induced electric-dipole moment of biexcitonic molecules in a GaAs/Al0.3Ga0.7As superlattice. The macroscopic oscillating electric field, associated with the microscopic wave packet dipole moments, is monitored by time-resolved transmittive electro-optic sampling. The field dependence of the biexcitonic binding energy is detected by transient four-wave mixing. From these experiments, an ultrafast non-resonant excitation mechanism of biexcitons is inferred.
Author(s)