Refractive index database

nk database   |   n2 database   |   about




Optical constants of TiO2 (Titanium dioxide)
Sarkar et al. 2019: Thin film; n,k 0.30–1.69 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants


Titanium(IV) oxide (Titanium dioxide, TiO2) thin film (thickness 200 nm) on glass substrate.


S. Sarkar, V. Gupta, M. Kumar, J. Schubert, P.T. Probst, J. Joseph, T.A.F. König, Hybridized guided-mode resonances via colloidal plasmonic self-assembled grating, ACS Appl. Mater. Interfaces, 11, 13752-13760 (2019)
(Numerical data kindly provided by Dr. Tobias König)


[CSV - comma separated]   [TXT - tab separated]   [Full database record]


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