Plasmon coupling nanorice trimer for ultrahigh enhancement of hyper-Raman scattering.

ABSTRACT: A new tactic that using Ag nanorice trimer as surface-enhanced hyper Raman scattering substrate is proposed for realizing maximum signal enhancement. In this paper, we numerically simulate and theoretically analyze the optical properties of the nanorice trimer consisting of two short nanorices and a long nanorice. The Ag nanorice trimer can excite Fano resonance at optical frequencies based on the strong interaction between the bright and the dark mode. The bright mode is attributed to the first longitudinal resonance of the short nanorice pair, while the dark mode originates from the third longitudinal mode resonance of the long nanorice. The electric field distributions demonstrate that the two resonances with the largest field strength correspond to the first-order resonance of the long

SUBMITTER: Zhu S 

PROVIDER: S-EPMC7806829 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature