Femtosecond x-ray measurement of ultrafast melting and large acoustic transients.
Time-resolved x-ray diffraction with ultrashort ( approximately 300 fs), multi-keV x-ray pulses has been used to study the femtosecond laser-induced solid-to-liquid phase transition in a thin crystalline layer of germanium. Nonthermal melting is observed to take place within 300-500 fs. Following ultrafast melting we observe strong acoustic perturbations evolving on a picosecond time scale.
Sokolowski-Tinten
K
K
Institut für Laser- und Plasmaphysik, Universität Essen, D-45117 Essen, Germany. kst@ilp.physik.uni-essen.de
Blome
C
C
Dietrich
C
C
Tarasevitch
A
A
Horn von Hoegen
M
M
von der Linde
D
D
Cavalleri
A
A
Squier
J
J
Kammler
M
M