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.
Surface plasmon resonance can numerical aperture microscope objective be excited on 52. 3 nm gold film through a large 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.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第9期1113-1117,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.61177079)
黑龙江省自然科学基金重点项目(No.ZD201103)
黑龙江省教育厅海外学人项目(No.1251HD2002)
黑龙江省教育厅电子工程重点实验室科学技术研究项目
黑龙江大学青年基金资助
关键词
物理光学
表面等离子体共振
近场显微术
显微物镜
Physical optics
Surface plasmon resonance
Near-field microscopy
Microobjective
