Cu-MgF_2陶瓷薄膜光学常数尺度效应的数值模拟

Numerical Simulation for Size Effects of the Optical Constants of Cu-MgF_2 Cermet Films

对Cu金属颗粒镶嵌在MgF2陶瓷基体中形成的金属陶瓷薄膜光学常数的尺度效应进行了数值拟研究.用修正的M-G(Maxwell-Gannett)理论对Cu-MgF2金属陶瓷薄膜,在金属微粒体积分数一定时光学常数的尺度效应进行了理论计算,并将理论计算结果与实验数据进行了比较.结果表明:金属微粒在体积分数(f1=15%)情况下,修正M-G理论计算金属陶瓷薄膜所得的光学常数要更符合实验数据;进一步得到了Cu金属微粒尺度效应的修政参数及金属陶瓷薄膜光学常数的理论结果与实验数据之间存在偏差的原因.

In this paper,we carried out numerical simulation for the size effects of optical constants of the cermet film which is composed of nanoparticles Cu embedding in the ceramic matrix MgF2.By using the modified M-G（Maxwell-Gannett） theory,the optical constants of Cu-MgF2 cermet films with given noble metal volume fractions were theoretically calculated according to M-G theory,and the theoretical results were compared with the experimental data.The investigation indicates that considering the cermet films with given metal volume fraction（f1=15%）,the data resulted from the modified M-G theory are in good agreement with the experimental data,and this work obtains the size-effect modified parameters of the nanoparticles Cu and reasons for the deviations between the theoretical results and experimental data of the size effects of the optical constants for the cermet films.