钨酸钆镉晶体的光学性能  

OPTICAL PROPERTIES OF CADMIUM GADOLINIUM TUNGSTATE CRYSTAL

作　　者：孙桂芳[1] 牟娟[1] 钱霞[1] 阮树仁[1] 盛淑芳[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059

出　　处：《硅酸盐学报》2009年第11期1891-1894,共4页Journal of The Chinese Ceramic Society

基　　金：聊城大学科研基金资助项目

摘　　要：测试了钨酸钆镉[CdGd2(WO4)4,CGW]晶体在200～700nm波段的透射光谱和反射光谱。结果显示:CGW晶体在可见光区吸收非常小,具有良好的透光性。对测量得到的光谱进行了数学处理,计算得到了描述CGW晶体宏观光学特性的重要物理量,即晶体的折射率n(λ)、消光系数k(λ)和吸收系数α(λ)。用(αE)1/2对E作图,得出了晶体的光学能隙为3.53eV,证明了CGW晶体是间接带隙半导体。The transmittance spectra and the reflection spectra of cadmium gadolinium tungstate [CdGd2（WO4）4,CGW] single crystal were measured in a wave range from 200 to 700 nm.These spectra were treated by mathematical method.The results show that the CGW single crystal has excellent transmittance in the visible range.The absorption coefficient and the extinction coefficient as well as the refractive index of the CGW single crystal in the visible range were determined.A plot of（αE）^1/2 versus E is used to determine the optical energy gap of the CGW single crystal,and its optical energy gap is about 3.53 eV.This confirms that the CGW single crystal is an indirect gap semiconductor material.

关 键 词：钨酸钆镉晶体 光学性能 折射率 消光系数 吸收系数 

分 类 号：O734.1[理学—晶体学] O484.41