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Linear and nonlinear absorption of titanium dioxide films produced by plasma ion-assisted electron beam evaporation: Modeling and experiments

: Stenzel, O.; Wilbrandt, S.; Mühlig, C.; Schröder, S.

Volltext ()

Coatings 10 (2020), Nr.1, Art. 59, 15 S.
ISSN: 2079-6412
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()
absorption measurement; laser-induced deflection; nonlinear refraction; optical coating; optical constants

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.