ZHAO Ting, HUO Yiping*, HE Bing, ZHAO Kaijun, LIU Li
(School of Physics and Information Technology, Shaanxi Normal University, Xi′an 710119, Shaanxi, China)
Abstract:
Using the theory of plasmon hybridization, Fano resonances of silica-silver-silica-gold multilayer nanoshells are revealed. Based on the finite element method, the extinction properties of silica-silver-silica-gold multilayer nanoshells are investigated systematically. The results indicate that the symmetric multilayer nanoshells can achieve Fano resonance. The Fano resonances of silica-silver-silica-gold multilayer nanoshells are induced by dipole-dipole hybridization of the inner nanoshell and the outer nanoshell. By selecting the suitable geometric parameters, the position of the Fano resonance can be tuned between 600 and 900 nm.
KeyWords:
SiO2/Ag/SiO2/Au; Fano resonance; extinction spectra
