金属桥连纳米颗粒二聚体的渐进等离激元演化与巨大红外近场增强

Gradual plasmon evolution and huge infrared near-field enhancement of metallic bridged nanoparticle dimers.

作者信息

Huang Yu, Ma Lingwei, Hou Mengjing, Xie Zheng, Zhang Zhengjun

机构信息

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.

High-Tech Institute of Xi'an, Shaanxi 710025, P. R. China.

出版信息

Phys Chem Chem Phys. 2016 Jan 28;18(4):2319-23. doi: 10.1039/c5cp07185b.

DOI:10.1039/c5cp07185b

PMID:26752002

Abstract

By three-dimensional (3D) finite element method (FEM) plasmon mapping, gradual plasmon evolutions of both bonding dipole plasmon (BDP) and charge transfer plasmon (CTP) modes are visualized. In particular, the evolved BDP mode provides a physical insight into the rapid degeneration of electromagnetic hot spots in practical applications, while the rising CTP mode enables a huge near-field enhancement for potential plasmonic devices at infrared wavelengths.

摘要

通过三维（3D）有限元方法（FEM）等离子体映射，可以可视化键合偶极子等离子体（BDP）和电荷转移等离子体（CTP）模式的逐渐等离子体演化。特别是，演化后的BDP模式为实际应用中电磁热点的快速退化提供了物理见解，而上升的CTP模式则为红外波长下潜在的等离子体器件实现了巨大的近场增强。