The recording of multiframe holographic interferograms used in the study of high power laser effects in dielectrics and plasmas is described. With a temporal resolution of 100 ps and a spatial resolution of several mu m the system is capable of the stepwise registration of high-speed phenomena such as shock waves. The separation of the sequential holograms is variable from approximately 50 ps up to several ns. In experiments using an ND:glass laser system ( approximately 3 J with 100 ps) not only the shock front is seen but also strong self-focusing effects.

This letter reports the successful growth of short period (ZnSe)4/CdSe4 strained layer superlattices on (100) GaAs surface by atomic layer epitaxy. The superlattice was characterized by x-ray diffraction and Raman scattering. Superlattice period was calculated from the satellite peaks and was in good agreement with the expected value. 2LO Raman scattering in resonance with the E1h exciton level was observed. Experimental exciton energy was compared with the one calculated in a finite-square-well model. A Raman line due to stimulated Raman scattering was also observed.

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