https://doi.org/10.1140/epjb/e2004-00369-4
Light-polarization and intensity dependence of higher-order nonlinearities in excitonic FWM signals
1
Institute for Theoretical Physics,
University of Bremen,
28334 Bremen, Germany
2
Institute for Solid State Physics,
University of Bremen,
28334 Bremen, Germany
Received:
8
July
2004
Published online:
14
December
2004
A theory-experiment comparison for the intensity and polarization dependence of spectrally resolved transient four-wave-mixing signals is presented for a ZnSe single quantum well. Results for high intensities deviate from a simple model based on the optical Bloch equations for a five-level system whereas a microscopic theory for coherent excitonic and biexcitonic nonlinearities shows excellent agreement.
PACS: 71.35.-y – Excitons and related phenomena / 78.47.+p – Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
