Refractive Index of GaP, Gallium Phosphide

Gallium phosphide (GaP), a phosphide of gallium, is a compound semiconductor material with an indirect band gap of 2.26 eV. The polycrystalline material has the appearance of pale orange pieces.

For a typical sample of GaP the refractive index and extinction coefficient at 632.8 nm are 3.314 and 0.000. 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 - Sopra Material Database

Wikipedia: Gallium phosphide
Sopra Material Database
D. E. Aspnes and A. A. Studna (1983) Dielectric functions and optical parameters of Si, Ge, GaP, GaAs, GaSb, InP, InAs, and InSb from 1.5 to 6.0 eVdoi: 10.1103/PhysRevB.27.985

No guarantee of accuracy - use at your own risk.