Refractive Index of GaAs, Gallium Arsenide

Gallium arsenide (GaAs) is a compound of the elements gallium and arsenic. It is a III/V semiconductor, and is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared light-emitting diodes, laser diodes, solar cells, and optical windows.

For a typical sample of GaAs the refractive index and extinction coefficient at 632.8 nm are 3.857 and 0.198. Below are files of complete refractive index and extinction coefficients. If the file is not available for download, you can request our proprietary file by clicking "Request".

  • Tab-delimited data file for unrestricted use
Wavelength (nm)

Refractive Index Reference - J. B. Theeten, D. E. Aspnes, and R. P. H. Chang, J. Appl. Phys. 49, 6097 (1978)

Sopra Material Library
Wikipedia: Gallium arsenide
Handbook of optical constants of solids By Edward D. Palik: Gallium arsenide

No guarantee of accuracy - use at your own risk.