锥形金属包覆介质探针纳米聚焦的光场特性

Optical field characteristics of nanofocusing by conical metal-coated dielectric probe.

作者信息

Tanaka Kazuo, Katayama Kiyofumi, Tanaka Masahiro

机构信息

Department of Electronics and Computer Engineering, Gifu University, Yanagido 1-1,Gifu City 501-1193, Japan. tanakazu@.gifu-u.ac.jp

出版信息

Opt Express. 2011 Oct 10;19(21):21028-37. doi: 10.1364/OE.19.021028.

DOI:10.1364/OE.19.021028

PMID:21997111

Abstract

Nanofocusing of surface plasmon polariton by a conical metal-coated dielectric probe was investigated numerically using the three dimensional volume integral equation. The basic characteristics of the nanofocused optical fields generated by this probe were investigated in detail. The intensity distribution near the probe tip was found to be very sensitive to the shape of the probe tip. Enhanced local fields interfere near the tip for certain probe tip shapes.

摘要

利用三维体积积分方程对锥形金属包覆介质探针表面等离激元极化激元的纳米聚焦进行了数值研究。详细研究了该探针产生的纳米聚焦光场的基本特性。发现探针尖端附近的强度分布对探针尖端的形状非常敏感。对于某些探针尖端形状，增强的局部场在尖端附近相互干涉。