Transparent anatase titania films: A critical study on optical properties

Titania thin films are prepared by electron beam evaporation and deposition conditions are optimized. X-ray diffraction studies have shown a polycrystalline nature of the films with anatase phase. The preferential orientation as well as electro-optical properties are found to be sensitive to substrate temperature. The structural and optical studies carried out on this high refractive index material give ample evidence for its columnar and porous structure. The analytical expressions enabling the derivation of optical constants from its transmission spectrum only, have successfully applied. Finally, the refractive index dispersion is discussed in terms of the single-oscillator Wimple and DiDodmenico model.