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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
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
关键词
钨酸钆镉晶体
光学性能
折射率
消光系数
吸收系数
cadmium gadolinium tungstate crystal
optical properties
refractive index
extinction coefficient
absorption coefficient
