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Phase Transitions in the Picosecond Time Domain

Published online by Cambridge University Press:  26 February 2011

Hani E. Elsayed-Ali  and
Gerard A. Mourou
Hani E. Elsayed-Ali
Affiliation:
University of Rochester, Laboratory for Laser Energetics, 250 East River Road, Rochester NY 14623–1299, 716/275–5101
Gerard A. Mourou
Affiliation:
University of Rochester, Laboratory for Laser Energetics, 250 East River Road, Rochester NY 14623–1299, 716/275–5101
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Abstract

The physical processes occurring during the initial stages of ultrafast laser heating of metals are described. Femtosecond laser irradiation is used to create nonequilibrium heating in metals. In such a nonequilibrium state, the electron temperature can be heated up to a few thousand degrees above the lattice temperature. Electron-lattice relaxation is time-resolved in copper and found to be 1 – 4 ps depending on the laser heating ffuence. The technique of time-resolved electron diffraction (a lattice structural and temperature probe) is described. Utilization of this technique for lattice temperature measurement of thin metal films is demonstrated.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 77: Symposium D – Interfaces, Superlattices, and Thin Films , 1986 , 51
Copyright
Copyright © Materials Research Society 1987

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References

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