Optical constants of Al2O3 (Aluminium sesquioxide, Sapphire, Alumina)
Malitson and Dodge 1972: α-Al2O3 (Sapphire); n(e) 0.20–5.0 µm
Wavelength:
µm
(0.2–5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.5039759λ^2}{λ^2-0.0740288^2}+\frac{0.55069141λ^2}{λ^2-0.1216529^2}+\frac{6.5927379λ^2}{λ^2-20.072248^2}$$Comments
Synthetic sapphire, Extraordinary ray (e), 20 °C
References
1) I. H. Malitson and M. J. Dodge. Refractive Index and Birefringence of Synthetic Sapphire, J. Opt. Soc. Am. 62, 1405 (1972)
2) M. J. Dodge, "Refractive Index" in Handbook of Laser Science and Technology, Volume IV, Optical Materials: Part 2, CRC Press, Boca Raton, 1986, p. 30
* Ref. 1 is a talk abstract in a conference program; Ref. 2 provides a dispersion formula
Data
INFO
Aluminium sesquioxide, Al2O3
Other names
- Alumina
- Aluminium oxide
- Aloxite
- Aluminium oxide (α)
- Aluminium(III) oxide
- Dialuminium trioxide
Mineral
- Corundum
Gemstones
- Sapphire
- Ruby