TY - JOUR A1 - Zimmermann, R. A1 - Hartmann, Michael T1 - Theory of the dynamical stark effect of excitons in CdS T2 - Journal of Crystal Growth N2 - The dynamical Stark effect of excitons in CdS bulk crystals has been measured recently using differential transmission spectroscopy (DTS). A general DTS formula is derived taking into account exciton-exciton interaction. A perculiar influence of the pump and test polarization on its magnitude is predicted. Concerning the dephasing (transverse relaxation), coupling to optical phonons is treated on a microscopic level. A density-matrix approach leads to the imaginary part of the exciton-phonon self energy. Its strong frequency dependence which shows up as a non-Markoff relaxation strongly suppresses the relaxation for the pump pulse at large detuning. A more sophisticated approach using the non-equilibrium Green function gives deeper insight into the underlying scattering processes. KW - Physics Y1 - 2014 UR - https://opus4.kobv.de/opus4-srh/frontdoor/index/index/docId/603 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Full text due to copyright not available. VL - 101 IS - 1-4 SP - 341 EP - 345 ER -