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Proceedings Paper

Photon absorption and the decay of surface excitation on sapphire (1120)-(3x1)
Author(s): Alex V. Hamza; Robert S. Hughes; Lloyd L. Chase; Howard W. Lee
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Paper Abstract

A laser-based two-pulse correlation technique is used to investigate the mechanisms of photon absorption and the decay of surface excitation on Al2O3(1120). The mechanism for emission of positive or neutral particles depends on the wavelength and/or pulsewidth. In our previous study for a pulsewidth of 80 picoseconds at 1064 nm the lifetime of the surface excitation leading to detectable emission and further to optical surface damage was measured to be approximately 200 picoseconds. However, for 800 femtosecond pulses at 616 nm the measured lifetime is a few nanoseconds. In both cases a low-order absorption process is indicated.

Paper Details

Date Published: 29 July 1992
PDF: 7 pages
Proc. SPIE 1624, Laser-Induced Damage in Optical Materials: 1991, (29 July 1992); doi: 10.1117/12.60127
Show Author Affiliations
Alex V. Hamza, Lawrence Livermore National Lab. (United States)
Robert S. Hughes, Lawrence Livermore National Lab. (United States)
Lloyd L. Chase, Lawrence Livermore National Lab. (United States)
Howard W. Lee, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 1624:
Laser-Induced Damage in Optical Materials: 1991
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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