Ag–TiO2 nanocermet thin films, deposited for optical filtering applications by two sputtering techniques, codeposition and multilayer deposition, exhibit surface plasmon absorption in the spectral range 450–500 nm. The cosputtering technique induces a columnar growth, whereas multilayer deposition produces a more-random distribution of silver inclusions. Both films have large, flat silver grains at the air–cermet interface. An optical double-heterogeneous layer model based on the experimental morphological parameters of the films accounts well for their experimental transmittance, notably for extra absorption near 700 nm, which is attributed to a surface plasmon in the flat silver grains of the surface.
© 2000 Optical Society of America
Original Manuscript: April 20, 1999
Revised Manuscript: January 10, 2000
Published: June 1, 2000
Anass Dakka, Jacques Lafait, Claude Sella, Serge Berthier, Mohammed Abd-Lefdil, Jean-Claude Martin, and Malik Maaza, "Optical properties of Ag–TiO2 nanocermet films prepared by cosputtering and multilayer deposition techniques," Appl. Opt. 39, 2745-2753 (2000)