PbTiO_3薄膜的非线性光学性质研究  

Study on Optical Nonlinearity in PbTiO_3 Film

作　　者：顾玉宗[1] 王献伟[1] 夏晓志[1] 王素莲[1] 

机构地区：[1]河南大学物理信息光电子学院,河南开封475001

出　　处：《河南大学学报（自然科学版）》2005年第1期16-18,共3页Journal of Henan University:Natural Science

基　　金：河南科技厅自然基金(211010700);河南教育厅自然基金(20011400004);河南高校骨干教师资助项目

摘　　要：用射频磁控溅射系统在α Al2O3衬底上制备了具有钙钛矿结构的PbTiO3薄膜. 用光学透射测量方法得到了该薄膜材料的基本光学常数 (带隙、线性折射率、线性吸收系数). 利用Z 扫描技术确定的非线性折射系数n2的符号及大小为-2. 8×10-7 esu,双光子吸收系数为 51. 8cm/GW. 这些结果表明PbTiO3铁电薄膜在非线性光学上具有潜在的应用前景.This study fabricated PbTiO_(3) thin film with pervoskite structure on α-Al_(2)O_(3) substrate using a RF-magnetron sputtering system. The band gap, linear refractive indices and absorption coefficients fundamental optical constants of the film were obtained through optical transmittance measurements. The magnitude and sign of the nonlinear refractive index n_(2) were determined to be as high as -2.8×10^(-7) esu by using the single beam Z-scan technique with a picosecond laser. The two-photon absorption coefficient of the PbTiO_(3) film was determined to be 51.8 cm/GW. All these results show that PbTiO_(3) ferroelectric thin films have potential applications in nonlinear optics.

关 键 词：非线性光学性质 PbTiO3薄膜 射频磁控溅射 Z-扫描 

分 类 号：O484.41[理学—固体物理]