| Design of the sample cell in near-field surface-enhanced Raman scattering by finite difference time domain method |
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| 作者姓名： | 李亚琴 简国树 吴世法 |
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| 作者单位： | Department of Physics Dalian University of Technology，Dalian 116024，Department of Physics，Dalian University of Technology，Dalian 116024，Department of Physics，Dalian University of Technology，Dalian 116024 |
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| 摘 要： | The rational design of the sample cell may improve the sensitivity of surface-enhanced Raman scattering (SERS) detection in a high degree. Finite difference time domain (FDTD) simulations of the configuration of Ag film-Ag particles illuminated by plane wave and evanescent wave are performed to provide physical insight for design of the sample cell. Numerical solutions indicate that the sample cell can provide more "hot spots" and the massive field intensity enhancement occurs in these "hot spots". More information on the nanometer character of the sample can be got because of gradient-field Raman (GFR) of evanescent wave.
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