Linear and nonlinear optical properties of lanthanum-modified lead zirconate titanate ( Pb0.92La0.08)( Zr0.65Ti0.35) O-3 ( PLZT 8/65/35) ferroelectric thin films are presented in this paper. The PLZT ferroelectric thin films were grown on quartz substrates by radio-frequency magnetron sputtering at 650 degrees C. Their crystalline structure and surface morphologies were examined by x-ray diffraction and atomic force microscopy, respectively. It was found that the PLZT thin films exhibit well-crystallized perovskite structure and good surface morphology. The fundamental optical constants ( the band gap energy, linear refractive index and absorption coefficient) were obtained through the optical transmittance measurements. A Z-scan technique was used to investigate the optical nonlinearity of the PLZT thin films on quartz substrates. The films display a strong third-order nonlinear optical effect. A large and negative nonlinear refractive index n(2) is determined to be 1.21 x 10(-6) esu for the PLZT thin films. All results show that the PLZT ferroelectric thin films have potential applications in nonlinear optical devices.
1.Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China 2.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
Leng, Wenjian,Yang, Chuanren,Ji, Hong,et al. Linear and nonlinear optical properties of (Pb,La)(Zr,Ti)O-3 ferroelectric thin films grown by radio-frequency magnetron sputtering[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2007,40(4):1206-1210.