X-ray movies of ultrafast atomic motion
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 1 (1999) 110
Abstract:
Using ultrafast X-ray, line radiation generated with a 20-fs multi-terawatt laser system, femtosecond induced lattice dynamics was observed in bulk semiconductors with milliangstrom spatial and picosecond resolution via time resolved X-ray diffraction. Coherent phonon generation and propagation, ultrafast melting of thin films and buried interface lattice coupling were observed.Detection of nonthermal melting by ultrafast X-ray diffraction.
Science 286:5443 (1999) 1340-1342
Abstract:
Using ultrafast, time-resolved, 1.54 angstrom x-ray diffraction, thermal and ultrafast nonthermal melting of germanium, involving passage through nonequilibrium extreme states of matter, was observed. Such ultrafast, optical-pump, x-ray diffraction probe measurements provide a way to study many other transient processes in physics, chemistry, and biology, including direct observation of the atomic motion by which many solid-state processes and chemical and biochemical reactions take place.Bulk phase explosion and surface boiling during short pulse laser ablation of semiconductors
IQEC, International Quantum Electronics Conference Proceedings (1999) 231-232
Abstract:
Femtosecond laser ablation of semiconductors was studied with a number of techniques, including time resolved microscopy and time-of-flight mass spectroscopy. The laser pulse excites a very dense electron-hole plasma in the semiconductor, leading to nonthermal melting on a sub-picosecond timescale. The liquid is left in a state of high temperature and high pressure.Bulk phase explosion and surface boiling during short pulse laser ablation of semiconductors
Optics InfoBase Conference Papers (1999)
Lattice dynamics of femtosecond laser-excited semiconductors probed by ultrafast x-ray diffraction
Optics InfoBase Conference Papers (1999)