Numerically investigating the enhanced Raman scattering performance of individual Ag nanowire tips

被引：11

作者：

Du, ChaoLing ^{[1
]}

Du, ChaoJun ^{[2
,3
]}

You, YuMeng ^{[4
]}

Zhu, Yan ^{[1
]}

Jin, SongLin ^{[1
]}

He, CongJun ^{[1
]}

Shi, DaNing ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211100, Peoples R China

[2] Nanyang Inst Technol, Dept Chem & Biochem Engn, Nanyang 473004, Peoples R China

[3] Beijing Inst Technol, Dept Chem Engn & Environm, Beijing 100081, Peoples R China

[4] Yale Univ, Dept Chem, New Haven, CT 06520 USA

来源：

APPLIED OPTICS | 2011年 / 50卷 / 25期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

SPECTROSCOPY; NANOPARTICLES; MOLECULES;

D O I：

10.1364/AO.50.004922

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The enhanced Raman scattering (ERS) performance of individual Ag nanowire (NW) tips with the shape of a bulb, a crown, a pencil, and a nanoparticle randomly decorated crown was numerically investigated by the finite element method. Their polarized surface ERS is revealed to be either anisotropic or isotropic, which is affected by the incident light wavelength and polarization and the shape of the tips. In our results, the pencil tip presents strong ERS effects with optimized ERS enhancement and lateral spatial resolution of about 0.3 x 10(9) and 1.3 nm, respectively. Effects of the pencil tip geometry (including the shape, angle, length, and size) on its tip ERS behavior are discussed as well. The present work also holds promise for individual Ag NW tip applications in microscope and spectroscope imaging and improvement, etc. (C) 2011 Optical Society of America

引用

页码：4922 / 4926

页数：5

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