Near-field simulation of obliquely deposited surface-enhanced Raman scattering substrates

被引：18
作者：
Jen, Yi-Jun [1 ]
Suzuki, Motofumi [2 ]
Wang, Yung-Hsiang [1 ]
Lin, Meng-Jie [1 ]
机构：
[1] Natl Taipei Univ Technol, Dept Electopt Engn, Taipei 106, Taiwan
[2] Kyoto Univ, Dept Micro Engn, Kyoto 6068501, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 11期
关键词：
NANOROD ARRAYS; FILMS; SPECTROSCOPY; SILVER;
D O I：
10.1063/1.4769806
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A semicontinuous gold layer on a template with a zig-zag structure has been demonstrated to be a highly sensitive substrate for surface-enhanced Raman scattering (SERS). Obliquely deposited gold layers on different templates yield different SERS strengths. In this work, a finite-difference time-domain method is utilized to analyze the electric field distribution within the gold layer when the film is illuminated by light. The random gold nanostructures are scanned and transformed into binary images to allow them to be simulated. The field intensities and SERS enhancement factors of different samples are calculated and compared. Our analysis results reveal the near-field characteristics of strong SERS and agree closely with experimental measurements. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769806]
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页数：6
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