【摘要】 利用高数值孔径显微物镜(油浸)并采用Kretschmann结构在52.3nm金膜上激发了表面等离子体共振.从麦克斯韦方程和菲涅尔公式出发,建立了相应的数学模型,并对物镜后焦面的光强分布进行了数值模拟.由图像传感器采集了后焦面的光强分布,通过计算机处理并显示.与理论结果对比,实验得到的共振角与理论值相符.对数值模拟和检测结果的分析为金膜表面介质的表面等离子体共振成像应用和折射率检测提供了理论与实验依据.更多还原

【Abstract】 Surface plasmon resonance can be excited on 52.3nm gold film through a large numerical aperture microscope objective lens(oil immersion)based on Kretschmann configuration.According to Maxwell’s equations and Fresnel’s formula,a mathematics model of the structure is established,and the intensity distribution at the back focal plane of the objective lens is simulated using Matlab and collected by imaging sensor and processed in computer.Experiment results agree well with theoretical result.The analysis of the numerical simulation and measuring result provide certain theoretical and experimental basis for the application of surface plasmon resonance imaging and refractive index detection of analyte attached to gold film.更多还原