Measurement of the correlation between the specular reflectance and surface roughness of Ag films

Abstract
We present here an empirical relationship between the root-mean-square surface roughness and the loss in specular reflectance at the wavelength of 3500 Å for silver films having surface roughness between 5 and 35 Å. Films deposited on super-smooth substrates and films whose roughness was purposely enhanced were used for these measurements. From these data and the Elson-Ritchie theory the correlation lengths for our films were determined.