Symmetric surface plasmon resonance sensing structure excited by a planar waveguide

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• 作者：Liu Jin<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>csup> ; Chen Bao-xue<sup>asup><sup> ; sup><sup>csup><sup> ; sup><sup>bxchen55@live.cnsup> ; Yang Hai-ma<sup>asup> ; Mamoru Iso<sup>dsup>
• 关键词：Surface plasmon resonance ; Symmetric structure ; Planar waveguide
• 刊名：Optics and Laser Technology
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：44
• 期：7
• 页码：2286-2291
• 全文大小：483 K

文摘

In this paper, we describe a novel waveguide surface plasmon resonance sensing structure, which consists of a symmetric structure and a planar waveguide. The core component is the symmetric structure of the metal layer, tested sample, and metal layer. The refractive index matching condition of this structure can be adjusted through the thickness of the sample. The planar waveguide is used to excite the surface plasmon wave, and then the parameters are tested and analyzed. The surface plasmon wave is excited when glycerin solutions with concentrations of 0 % -70 % are used to detect at thicknesses of 300 and 500 nm. The problem that the effective refractive index of the ion exchange planar waveguide is large and using this index to excite the surface plasmon wave between the metal and dielectric for detection is difficult to achieve can be countered by appropriately choosing the thickness of the dielectric in order to be able to measure different refractive indices.