title: Influence of the interaction between metal particles on optical properties of Ag-Si3N4 composite films. II. Two-particle approximation.
abstract: The interaction between metal particles was calculated based on the discrete dipole method. The calculated results revealed that the multiple interactions in a collection of metal particles are dominated by the interaction between the neighboring particles. Thus, a two-particle approximation was deduced and applied to estimate the optical absorption and near-field enhancement property of Ag-Si3N4 composite films. The calculated results indicated that the interaction between Ag particles will induce extra absorption near the surface plasmon resonance peak and improve the near-field enhancement property of composite films. Calculated results were consistent with the experimental results.
authors.affiliation: Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. dingrong.ou@nims.go.jp
authors.forename: Ding Rong
authors.initials: DR
authors.lastname: Ou
authors.forename: Jing
authors.initials: J
authors.lastname: Zhu
authors.forename: Jia Hao
authors.initials: JH
authors.lastname: Zhao