Local Capacitor Model for Plasmonic Electric Field Enhancement

被引：113

作者：

Kang, J. H. ^{[1
]}

Kim, D. S. ^{[2
,3
]}

Park, Q-Han ^{[1
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136701, South Korea

[2] Seoul Natl Univ, Ctr Subwavelength Opt, Seoul 151747, South Korea

[3] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

MOLECULES; ANTENNA;

D O I：

10.1103/PhysRevLett.102.093906

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a local capacitor model that enables a simple yet quantitatively accurate description of lightning rod effect in nanoplasmonics. A notion of lambda-zone capacitance is proposed and applied to predict the strongly induced electric field by a light source near nanoscale metal edges such as metal tip or metal gap. The enhancement factor, calculated from the local capacitor model, shows excellent agreement with more rigorous results. The lambda-zone capacitor allows a blockwise treatment of nano-optical devices and constitutes a basic element of optical nanocircuits.

引用

页数：4

共 15 条

[1] Input impedance, nanocircuit loading, and radiation tuning of optical nanoantennas [J].