Obtaining super resolution light spot using surface plasmon assisted sharp ridge nanoaperture

被引：132

作者：

Jin, EX ^{[1
]}

Xu, XF ^{[1
]}

机构：

[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47906 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1875747

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Finite difference time domain computations is used to study surface plasmon (SP) excitation around C- and H-shaped ridge nanoapertures made in silver film. The SP enhances optical transmission, in addition to the transmission mechanism of the waveguide propagation mode and Fabry-Perot-like resonance. However, the near-field collimation of ridge aperture is found completely destroyed. On the other hand, using a bowtie-shaped aperture with sharp ridges made in silver, the loss of near-field collimation can be recovered. A super resolution optical spot with full width half magnitude as small as 12 nmx16 nm is achieved due to the resonant SP excitation localized at the tips of bowtie. Much higher field enhancement is also obtained compared to the bowtie aperture made in chromium. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 24 条

[1] Light transmission through metallic channels much smaller than the wavelength [J].