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Proceedings Paper

Electric-field enhancement by nodular defects in multilayer coatings irradiated at normal and 45° incidence
Author(s): Christopher J. Stolz; Francois Y. Genin; Thomas V. Pistor
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Paper Abstract

The standing-wave electric-field profile within multilayer coatings is significantly perturbated by a nodular defect. The intensity, which is proportional to the electric field squared, is increased in the high index material by ≥3x at normal incidence and ≥12x at 45 degrees incidence angle. Therefore is it not surprising that nodular defects are initiation sites of laser-induced damage. In this study, the impact of reflectance-band centering and incident angle are explored for a 1 μm diameter nodular defect seed overcoated with a 24 layer high-reflector constructed of quarter-wave thick alternating layers of hafnia and silica. The modeling was performed using a three-dimensional finite-element analysis code.

Paper Details

Date Published: 10 June 2004
PDF: 9 pages
Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); doi: 10.1117/12.523453
Show Author Affiliations
Christopher J. Stolz, Lawrence Livermore National Lab. (United States)
Francois Y. Genin, Lawrence Livermore National Lab. (United States)
Thomas V. Pistor, Panoramic Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 5273:
Laser-Induced Damage in Optical Materials: 2003
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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