Fano-like resonance characteristics of asymmetric Fe2O3 @ Au core/shell nanorice dimer

A geometrical configuration of Fe2O3/Au core-shell nanorice dimer is proposed and its multipolar plasmon Fano- like resonance characteristics are theoretically investigated by generalizing the plasmon hybridization model of individual nanorice to the bright and dark modes of the nanorice dimer. Unde...

Full description

Saved in:
Bibliographic Details
Published in:中国物理B：英文版 2014 (8), p.474-480
Main Author: Wang Bin-Bing Zhou Jun Zhang Hao-Peng Chen Jin-Ping
Format: Article
Language:English
Subjects:
Fe2O3
不对称
二聚体
消光光谱
等离子体激元
表面等离子体共振
谐振特性
金
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A geometrical configuration of Fe2O3/Au core-shell nanorice dimer is proposed and its multipolar plasmon Fano- like resonance characteristics are theoretically investigated by generalizing the plasmon hybridization model of individual nanorice to the bright and dark modes of the nanorice dimer. Under the irradiation of polarization light, the extinction spectra of the nanorice dimer are numerically simulated by using the finite element method （FEM）. Our studies show that the Fano-like resonance of the nanorice dimer results in an asymmetric line shape of the Fano dip in the extinction spectrum which can be controlled by varying the structure parameters of the nanorice dimer. Meanwhile, there is a giant field enhancement at the gap between the two nanorices on account of the plasmonic coupling in the nanorice dimer. The aforementioned two characteristics of the nanorice dimer are useful for plasmon-induced transparency and localized surface plasmon resonance sensors.
ISSN:1674-1056
2058-3834