Infinite-order excitonic BLOCH equations for asymmetric nanostructures.
We present a new exciton-based formalism for calculating the coherent response of asymmetric semiconductor multiple quantum well structures to ultrashort optical pulses valid to infinite order in the optical field and including the self-generated intraband fields. We use these equations to calculate and explain the oscillations with time delay of peaks in the spectrally resolved degenerate four-wave mixing signals from biased semiconductor superlattices, obtaining good agreement with experiment.
Hawton
M
M
Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1.
Dignam
M M
MM