Refractive index database

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Optical constants of TiO2 (Titanium dioxide)
Jolivet et al. 2023: Anatase thin film; n,k 0.207–0.827 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants


TiO2 anatase thin film deposited by ALD at 300 °C


A. Jolivet, C. Labbé, C. Frilay, O. Debieu, P. Marie, B. Horcholle, F. Lemarié, X. Portier, C. Grygiel, S. Duprey, W. Jadwisienczak, D. Ingram, M. Upadhyay, A. David, A. Fouchet, U. Lüders, J. Cardin. Structural, optical, and electrical properties of TiO2 thin films deposited by ALD: Impact of the substrate, the deposited thickness and the deposition temperature. Appl. Surf. Sci. 608, 155214 (2023) (Numerical data kindly provided by Julien Cardin)


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Titanium dioxide, TiO2

Titanium dioxide (TiO2) is a naturally occurring oxide of titanium. It possesses a high refractive index, making it an important material in optical coatings and components, especially as a white pigment in paints, cosmetics, and sunscreens due to its UV absorbing properties. The two main crystal forms used in industry are the rutile and anatase forms. Additionally, its photovoltaic and photocatalytic properties have led to research and applications in solar cells and air purification, respectively. TiO2 also has a robust chemical stability under various conditions, which makes it a preferred material for use in harsh environments.

Other names

  • Titanium(IV) oxide
  • Titania


  • Rutile
  • Anatase
  • Brookite

External links