Correlation Between Optical Absorption and Refractive Index of Silica and Silicate Glasses Implanted with Copper

Abstract

ABSTRACTThe refractive indices and optical absorptions of Cu implanted glasses have been measured. Silica and two silicate glasses have been implanted with Cu+ to nominal doses ranging from 3×1015 cm−2 to 6×1016 cm−2 at an energy of 160KeV and currents of ∼4μAcm−2. Substrate temperatures, during implantation, ranged from ∼100K to 700K. Both refractive index and optical absorption of the silica are functions of dose and substrate temperature. Neither of these properties are significantly altered in the silicate glasses for any dose or substrate temperature. The observed increases in the index of the implanted silica are attributed to an optical band due to Cu0 colloids.