Klaus Sokolowski-Tinten, Michael Horn-von Hoegen, D. von der Linde, Andrea Cavalleri, C. W. Siders, F. L. H. Brown, D. M. Leitner, Csaba Tóth, Jeff A. Squier, C. P. J. Barty, K. R. Wilson, Martin Kammler
- A study of lattice dynamics in fs-laser-excited crystalline bulk Ge and Ge/Si-heterostructures, using time-resolved x-ray diffraction, was presented. Fast energy transport deep into the bulk of the material, coherent acoustic phonon dynamics, lattice anharmonicity, and vibrational transport across a buried interfaces were observed. Graphs showing time-dependent shifts of the centroid of the measured rocking curves in the Ge-overlayer and in the Si-substrate for different fluences, were presented.