Resonant self-diffraction from dynamic, laser-induced gratings in II-VI compounds

Dynamic laser-induced gratings (LIG) are investigated in CdS and ZnO. The microscopic processes resulting in the formation of LIG are discussed. A nonlinear coupling is found between oscillators active in the polarizations
\overrightarrow{E} \perp \overrightarrow{c}
and
\overrightarrow{E} \parallel \overrightarrow{c}
, respectively. The influence of induced absorption optical bistability on the temporal evolution of LIG is observed and qualitatively discussed.