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Femtosecond-Time-Resolved Surface Structural Dynamics of Optically Excited Silicon

1983; American Physical Society; Volume: 51; Issue: 10 Linguagem: Inglês

10.1103/physrevlett.51.900

1092-0145

C. V. Shank, R. Yen, C. Hirlimann,

Force Microscopy Techniques and Applications

The dynamics of the structural changes that take place on a silicon surface following excitation with an intense optical pulse are observed with 90-fs time resolution. The threefold rotational symmetry of the silicon $〈111〉$ surface becomes rotationally isotropic within a picosecond after excitation consistent with a transition from the crystalline to the liquid molten state.