Refractive Index of Cu, Copper

Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity.

For a typical sample of Cu the refractive index and extinction coefficient at 632.8 nm are 0.239 and 3.416. 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 - H. J. Hagemann, W. Gudat, and C. Kunz, DESY Report SR-74/7, Hamburg, 1974; H. J. Hagemann, W. Gudat, and C. Kunz, J. Opt. Soc. Am. 65, 742 (1975)

H.-J. Hagemann, W. Gudat, and C. Kunz (1975) "Optical constants from the far infrared to the x-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and A12O3" JOSA, Vol. 65, Issue 6, pp. 742-744 doi:10.1364/JOSA.65.000742

No guarantee of accuracy - use at your own risk.