利用调制式椭偏仪测量薄膜电光系数  

MEASUREMENT OF THE ELECTRIC-OPTIC INDEX OF THIN FILMS BY USING MODULATED ELLIPSOMETRY

作　　者：李芳[1] 王杰[2] 王丹阳[2] 莫党[1] 陈王丽华[2] 

机构地区：[1]中山大学物理系光电材料与技术国家重点实验室,广东广州510275 [2]香港理工大学应用物理系

出　　处：《红外与毫米波学报》2005年第1期31-33,共3页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金资助项目(50372085)

摘　　要：利用调制式的椭偏仪测量了掺镧锆钛酸铅PLZT薄膜的电光系数.首先用反射椭偏测量的方法得到薄膜的折射率(n)和厚度(d),然后利用透射椭偏在线测量的功能,在样品上加电场(E),得到薄膜的折射率的改变δn. 最后用测量得到的厚度,折射率以及折射率的改变来计算薄膜的电光系数.该仪器的灵敏度很高,很适合较薄的膜层材料电光性质的测量.The electro-optic index of PLZT thin films was measured by means of modulated ellipsometry. First the refractive index (n) and thickness ( d) were measured by reflecting ellipsometry method. Then the electric field was applied on the film, and the change of refraction (deltan) by was obtained by transmission ellipsometry method. Finally, the electro-optic index was calculated by the data of n, d, E and deltan. This instrument has high sensitivity. So it is suitable to measure the electro-optical property of the thin film.

关 键 词：电光系数 椭偏仪 折射率 PLZT薄膜 透射 椭偏测量 反射 制式 调制 掺镧 

分 类 号：TN304[电子电信—物理电子学] O484[理学—固体物理]