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TixSi1-xO2 optical coatings with tunable index and their response to intense subpicosecond laser pulse irradiation

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9 Author(s)
Nguyen, D. ; Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA ; Emmert, L.A. ; Cravetchi, I.V. ; Mero, M.
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Ion-beam sputtered TixSi1-xO2 binary-oxide films of high optical quality with tunable bandgap and refractive index were produced using zone targets. The suitability of the films for high-power subpicosecond laser applications is explored by laser breakdown measurements. The observed scaling laws of the single-pulse breakdown threshold—a power law with respect to pulse duration and a linear law with respect to bandgap energy—are similar to results obtained with high-quality simple oxides. The single- and multiple-pulse breakdown behaviors of these binary films indicate only slightly larger defect densities than found in simple oxides.

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Applied Physics Letters  (Volume:93 ,  Issue: 26 )