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Solid Phase Superheating During Picosecond Laser Melting of Gallium Arsenide

Published online by Cambridge University Press:  28 February 2011

D. Von Der Linde ,
N. Fabricius ,
B. Danielzik  and
T. Bonkhofer
D. Von Der Linde
Affiliation:
Universitaet Essen, Fachbereich Physik, 4300 Essen 1, Fed. Rep. of Germany
N. Fabricius
Affiliation:
Universitaet Essen, Fachbereich Physik, 4300 Essen 1, Fed. Rep. of Germany
B. Danielzik
Affiliation:
Universitaet Essen, Fachbereich Physik, 4300 Essen 1, Fed. Rep. of Germany
T. Bonkhofer
Affiliation:
Universitaet Essen, Fachbereich Physik, 4300 Essen 1, Fed. Rep. of Germany
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Abstract

The velocity distributions of atoms evaporated from the surface of GaAs during laser heating with nanosecond and picosecond pulses are measured. The atomic velocities provide information about the surface temperature. For picosecond heating we observe a continuous transition of the temperature across the melting point, whereas for nanosecond heating the melting point is marked by a distinct plateau of the temperature curve. From these observations we conclude that the solid is strongly superheated during picosecond irradiation. A detailed analysis suggests superheating of typically a few hundred degrees above the melting point.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 74: Symposium A – Beam-Solid Interactions and Transient Processes , 1986 , 103
Copyright
Copyright © Materials Research Society 1987

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References

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