Surface plasmon resonances behavior in visible light of non-metal perovskite oxides AgNbO3

摘要

We investigate the surface plasmon resonances (SPRs) behavior of silver niobate (AgNbO) experimentally and theoretically. Result shows that the localized SPRs (LSPRs) of AgNbO combining with its interband transitions enlarge the absorption band across the whole ultraviolet-visible range. The LSPRs behavior in visible-light is mainly ascribed to the metal-like state of silver ion and self-assembled microstructures of AgNbO microcrystal. The ab initio density functional theory calculations are carried out to obtain the further insight of the SPRs behaviors. Theoretical study indicates that the Ag atoms are weakly bound in the perovskite structure, leading to a metal-like state, which was the key factor to SPRs behavior of AgNbO.