表面等离子体共振控制镜面反射率  

Using Surface Plasmon Resonance to Control the Reflection Index of Mirror

作　　者：彭杨[1] 侯静[1] 黄值河[1] 陆启生[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2012年第1期241-245,共5页Acta Optica Sinica

基　　金：教育部"新世纪优秀人才支持计划"(NCET-08-0142)资助课题

摘　　要：对金属介电常数随温度变化的计算进行了修正,提出了利用表面等离子体共振(SPR)实现温度控制镜面反射率的方法。在Kretschmann结构中的金属膜上涂覆热光系数较大的聚合物材料,考虑该结构中各种材料介电常数以及金属膜厚度随温度的变化,利用特征矩阵法进行了数值模拟,得到SPR反射率曲线随温度的变化。模拟结果显示,当波长为532nm的p偏振光分别以70°和75°入射时,在10℃～90℃范围内调节温度,可实现反射率在52.8%～41.5%和31.1%～18.8%范围内的调节。The calculation of the temperature-dependent dielectric function of metal is modified. A method to control the reflection index of mirror by using the surface plasmon resonance （SPR） is proposed. A polymer film with high thermooptic coefficient is coated on the metal film in the Kretschmann configuration. The variations of metal film thickness and dielectric constants for all layers with temperature are calculated, and the proposed device is numerically simulated by using the characteristic matrix method. The results show that when the incident wavelength is 532 nm, the temperature is controlled between 10 ℃and 90 ℃, the reflection index can be controlled from 52.8% to 41.5% for 70° incident angle and 31.1% to 18.8% for 75° incident angle, respectively.

关 键 词：表面光学 表面等离子体共振 反射率 衰减全反射 

分 类 号：O436[机械工程—光学工程]