Near-field enhanced ultraviolet resonance Raman spectroscopy using aluminum bow-tie nano-antenna

被引：50

作者：

Li, Ling ^{[1
]}

Lim, Shuang Fang ^{[1
]}

Puretzky, Alexander A. ^{[2
]}

Riehn, Robert ^{[1
]}

Hallen, H. D. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 11期

基金：

美国国家卫生研究院;

关键词：

LIQUID BENZENE; SILVER; NANOANTENNAS; EXCITATION; GOLD;

D O I：

10.1063/1.4746747

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An aluminum bow-tie nano-antenna is combined with the resonance Raman effect in the deep ultraviolet to dramatically increase the sensitivity of Raman spectra to a small volume of material, such as benzene used here. We further demonstrate gradient-field Raman peaks for several strong infrared modes. We achieve a gain of similar to 10(5) in signal intensity from the near field enhancement due to the surface plasmon resonance in the aluminum nanostructure. The on-line resonance enhancement contributes another factor of several thousands, limited by the laser line width. Thud, an overall gain of hundreds of million is achieved. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4746747]

引用

页数：4

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