We present a numeric calculation of the exciton±exciton correlation for a one-dimensional semiconductor model with long-range Coulomb interactions, taking into account the effect of the exciton continuum. We use the obtained correlation functions to calculate the time integrated intensity of the four wave mixing signal. Changing the central frequency of the exciting pulses we observe changes in the profile and in the rise time of the time integrated signal for negative delays in qualitative agreement with experimental results. Our results show theoretically how the exciton continuum affects the coherence of four-particle correlations.
The effect of the exciton continuum on the exciton-exciton correlation
MARTINO, Giovanna;SAVASTA, Salvatore;GIRLANDA, Raffaello
2000-01-01
Abstract
We present a numeric calculation of the exciton±exciton correlation for a one-dimensional semiconductor model with long-range Coulomb interactions, taking into account the effect of the exciton continuum. We use the obtained correlation functions to calculate the time integrated intensity of the four wave mixing signal. Changing the central frequency of the exciting pulses we observe changes in the profile and in the rise time of the time integrated signal for negative delays in qualitative agreement with experimental results. Our results show theoretically how the exciton continuum affects the coherence of four-particle correlations.File in questo prodotto:
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