Optical interpretation for plasmonic adjustment of nanostructured Ag-NiO thin films
Alkeos Stamatelatos, Maria Tsarmpopoulou, Alexandros G. Chronis, Nikos Kanistras, Dimitrios I. Anyfantis, E. Violatzi, Dimitrios Geralis, M. M. Sigalas, P. Poulopoulos, Spyridon Grammatikopoulos
Abstract
Ultrathin Ag and Ni/NiO films are sequentially produced on Corning glass and silicon substrates by means of magnetron sputtering. Post annealing treatment in a furnace with air at [Formula: see text]C and [Formula: see text]C may lead to the formation of Ag nanostructures in NiO environment. Some of these samples present local surface plasmon resonances (SPRs). The sequence in which each layer is deposited, as well as, the state of the structure on which the layer is deposited, appears to play a pivotal role in the optical properties of these nanostructures, which are attributed to the growth properties of the nanocomposite thin films. Ultimately, rigorous theoretical calculations have been made for comparison and discussion with the experimental results.