Plasmonics of Diffused Silver Nanoparticles in Silver/Nitride Optical Thin Films.

ABSTRACT: Metal-dielectric multilayers are versatile optical devices that can be designed to combine the visible transmittance of dielectrics with the electronic properties of metals for plasmonic and meta-material applications. However, their performances are limited by an interfacial optical absorption often attributed entirely to the metal surface roughness. Here, we show that during deposition of AlN/Ag/AlN and SiN_x/Ag/SiN_x multilayers, significant diffusion of Ag into the top dielectric layer form Ag nanoparticles which excite localized surface plasmon resonances that are primarily responsible for the interfacial optical absorption. Based on experimental depth profiles, we model the multilayer's silver concentration profile as two complementary error functions: one for the

SUBMITTER: Ye Y 

PROVIDER: S-EPMC6934463 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature