【摘要】 对表面等离子体波共振现象产生的原理和激发条件进行了阐述。从电磁场理论和粒子振动的角度 ,分析了棱镜型表面等离子体波传感器产生共振的角度和待测液体折射率、介电常数的关系。通过自行设计的一套棱镜型表面离子体波传感器测试系统 ,测定了从 0 %～ 70 %的不同浓度甘油水溶液折射率与共振角度的关系 ,得到的实验结果具有较好的重复性并和理论分析相吻合。由此可以得到一种基于SPR现象的液体折射率测量方法更多还原

【Abstract】 The principle of surface plasmon resonance phenomenon and excitation condition of SPR are described in the paper .The relationship between the resonant angle produced by the prism SPW sensor and liquid refractive index as well as dielectric constant is analysed based on the electromagnetic field theory and particle vibration. The SPR depends on the permittivities both the metal and the dielectric medium,and its energy is localized at the interface. So this kind of senor has high sensitivity to changes in the refractive index and configuration of the surface. Surface plasmons are excited at a specific incident angle and result in a massive reduction in reflectivity at that angle required for excitation. Changing in the interfacial refractive index results in a change of the optimal angle required for excitation .Using a prism SPW sensor testing system ,measure the relationship between different concentration from 0% to 70% glycerine solution refractive index and resonant angle. Experimental results obtained have good repetition and are in agreement with theory analysis. Therefore, a novel measure method of liquid refractive index based on the phenomenon of SPR can be obtained.更多还原