Refractive Index of InSb, Indium Antimonide

Indium antimonide (InSb) is a crystalline compound made from the elements indium (In) and antimony (Sb). It is used in infrared detectors, including thermal imaging cameras, FLIR systems, infrared homing missile guidance systems, and in infrared astronomy.

For a typical sample of InSb the refractive index and extinction coefficient at 632.8 nm are 4.255 and 1.802. 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

No guarantee of accuracy - use at your own risk.