Refractive index database

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Optical constants of HfO2 (Hafnium dioxide, Hafnia)
Al-Kuhaili 2004: n 0.2–2.0 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



Thin films of hafnium oxide deposited by electron beam evaporation.


M. F. Al-Kuhaili. Optical properties of hafnium oxide thin films and their application in energy-efficient windows. Opt. Mat. 27, 383-387 (2004)


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Hafnium dioxide, HfO2

Hafnium dioxide (HfO2) is a high-index, low-absorption material used extensively in optical applications. It is especially valuable for making thin-film dielectric coatings for mirrors, anti-reflective coatings, and beam splitters. Due to its excellent thermal stability and resistance to chemical corrosion, it is well-suited for harsh environments. Additionally, its high refractive index makes it an attractive material for planar waveguides and other integrated optics components. Beyond its optical uses, hafnium dioxide is also a key material in the fabrication of advanced gate dielectrics in field-effect transistors, contributing to the miniaturization and performance improvement of electronic devices.

Other names

  • Hafnia
  • Hafnium(IV) oxide
  • Hafnium oxide

External links