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Time-Resolved Optical Studies of Picosecond Laser Interactions With Gaas Surfaces

Published online by Cambridge University Press:  26 February 2011

J.M. Liu ,
A.M. Malvezzi  and
N. Bloembergen
J.M. Liu
Affiliation:
GTE Laboratories, Incorporated, 40 Sylvan Road, Waltham, MA 02254
A.M. Malvezzi
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
N. Bloembergen
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
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Abstract

The interactions of picosecond laser pulses at 532 nm wavelength with GaAs surfaces have been studied with time-resolved reflectivity and transmission measurements at three probe wavelengths. At fluences below the melting threshold, the laser-generated electron-hole plasma is limited to a density below ≈1020cm−3. The high reflectivities of molten GaAs observed at fluences above the tlhreshold have a wavelength dependence inconsistent with a simple Drude model for a metallic GaAs molten layer. At high fluences, the evolution of a laser-induced vapor cloud is observed.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 51: Symposium A – Beam-Solid Interactions and Phase Transformations , 1985 , 225
Copyright
Copyright © Materials Research Society 1985

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References

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