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Open AccessArticle

Linear and Nonlinear Absorption of Titanium Dioxide Films Produced by Plasma Ion-Assisted Electron Beam Evaporation: Modeling and Experiments

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Fraunhofer Institute of Applied Optics and Precision Engineering, IOF, Albert-Einstein-Str. 7, 07745 Jena, Germany
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Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(1), 59; https://doi.org/10.3390/coatings10010059 (registering DOI)
Received: 20 December 2019 / Revised: 6 January 2020 / Accepted: 7 January 2020 / Published: 9 January 2020
(This article belongs to the Special Issue Optical Thin Films and Structures: Design and Advanced Applications)
Titanium dioxide films were prepared by plasma ion-assisted electron beam evaporation. Linear optical properties were investigated in terms of spectrophotometry using the beta-distributed oscillator (ß_do) model as a parametrized dispersion law. The nonlinear two-photon absorption coefficient of titanium dioxide was determined by means of the laser-induced deflection technique at a wavelength of 800 nm. The obtained values of (2–5) × 10−11 cm/W were consistent with published experimental values for rutile as well as for simulations performed in the frames of the ß_do and Sheik–Bahae models. View Full-Text
Keywords: optical coatings; titanium dioxide; optical constants; two-photon absorption; nonlinear refraction; scattering; laser-induced deflection; absorption measurement optical coatings; titanium dioxide; optical constants; two-photon absorption; nonlinear refraction; scattering; laser-induced deflection; absorption measurement
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Stenzel, O.; Wilbrandt, S.; Mühlig, C.; Schröder, S. Linear and Nonlinear Absorption of Titanium Dioxide Films Produced by Plasma Ion-Assisted Electron Beam Evaporation: Modeling and Experiments. Coatings 2020, 10, 59.

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