High sensitive detection of near-infrared absorption by surface plasmon resonance

被引:19
作者
Ikehata, A
Li, XL
Itoh, T
Ozaki, Y
Jiang, JH
机构
[1] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda 6691337, Japan
[2] Kwansei Gakuin Univ, Sch Sci & Technol, Res Ctr Near Infrared Spect, Sanda 6691337, Japan
[3] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Peoples R China
关键词
D O I
10.1063/1.1610812
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter we report on an operative method for high sensitive measurement of near-infrared absorption based on a surface plasmon resonance (SPR) technique. By coupling with the SPR of a gold film, an absorption band of water near 5173 cm(-1) assigned to a combination of the stretching and bending modes of OH groups is enhanced over 100 times compared with a case without the gold film. In addition, positive and negative enhancements of an absorption depending on the thickness of a gold film were observed as predicted by H. Kano [Appl. Opt. 33, 5166 (1994)]. These experimental results are mathematically well reproduced by use of Fresnel multiple-reflection theory. (C) 2003 American Institute of Physics.
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收藏
页码:2232 / 2234
页数:3
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