Refractive Index of Si3N4, Silicon Nitride, SiN, SiON

For a typical sample of Si3N4 the refractive index and extinction coefficient at 632.8 nm are 2.023 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 - Filmetrics Composite

No guarantee of accuracy - use at your own risk.