Deterioration of reflecting coatings by intermetallic diffusion.


Gold diffraction gratings overcoated with Al + MgF(2) to increase their efficiency in the vacuum ultraviolet suffered a severe loss in efficiency within six months to a year after coating; for example, from 50% to 2% at lambda1216 A. The cause of this loss was assumed to be interdiffusion of Au and Al; therefore, a more complete study of Au-Al film… (More)
DOI: 10.1364/AO.11.001594


8 Figures and Tables