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

Nguyen, D.; Emmert, L. A.; Cravetchi, I. V.; Mero, M.; Rudolph, W.; Jupe, M.; Lappschies, M.; Starke, K.; Ristau, D.
December 2008
Applied Physics Letters;12/29/2008, Vol. 93 Issue 26, p261903
Academic Journal
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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