Optical properties of Ag -TiO 2 nanocermet films prepared by cosputtering and multilayer deposition techniques.
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.
Dakka
A
A
Laboratoire de Physique des Matériaux, Facult des Sciences, Université Mohammed V, Avenue Ibn Batouta, BP 1014 Rabat, Morocco.
Lafait
J
J
Sella
C
C
Berthier
S
S
Abd-Lefdil
M
M
Martin
J C
JC
Maaza
M
M