中国物理B ›› 2002, Vol. 11 ›› Issue (12): 1324-1327.doi: 10.1088/1009-1963/11/12/320

• • 上一篇    

Large third-order optical nonlinearity in Au nanometre particle doped BaTiO3 composite films near the resonant frequency

王伟田, 杨光, 陈正豪, 周岳亮, 吕惠宾, 杨国桢   

  1. Laboratory of Optical Physics, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2002-07-03 修回日期:2002-08-12 出版日期:2002-12-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 5001161952).

Large third-order optical nonlinearity in Au nanometre particle doped BaTiO3 composite films near the resonant frequency

Wang Wei-Tian (王伟田), Yang Guang (杨光), Chen Zheng-Hao (陈正豪), Zhou Yue-Liang (周岳亮), Lü Hui-Bin (吕惠宾), Yang Guo-Zhen (杨国桢)   

  1. Laboratory of Optical Physics, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2002-07-03 Revised:2002-08-12 Online:2002-12-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 5001161952).

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摘要： Nanometre-sized gold particles embedded in BaTiO3 composite thin films (Au/BaTiO3) were fabricated by the pulsed laser deposition technique. The films were grown on MgO (100) substrates at 700℃. The crystalline property of the films was studied with x-ray diffraction. X-ray photoelectron spectroscopy was used to check the Au composition and chemical nature for the deposited films. The absorption peak due to the surface plasmon resonance of Au particles was observed at the wavelength of about 570 nm, which increased as the metal particle size was increased. The nonlinear optical properties of the Au/BaTiO3 films were determined using the z-scan method at the wavelength of 532 nm, which was close to the resonant frequency. The real and imaginary parts of the third-order nonlinear susceptibility χ(3) at an Au concentration of about 6.7 at.% were determined to be 6.62×10-7 esu and -6.24×10-8 esu, respectively. The films showed a very large absorption, masking the nonlinear refraction effect at high metal concentrations.

Abstract: Nanometre-sized gold particles embedded in BaTiO3 composite thin films (Au/BaTiO3) were fabricated by the pulsed laser deposition technique. The films were grown on MgO (100) substrates at 700℃. The crystalline property of the films was studied with x-ray diffraction. X-ray photoelectron spectroscopy was used to check the Au composition and chemical nature for the deposited films. The absorption peak due to the surface plasmon resonance of Au particles was observed at the wavelength of about 570 nm, which increased as the metal particle size was increased. The nonlinear optical properties of the Au/BaTiO3 films were determined using the z-scan method at the wavelength of 532 nm, which was close to the resonant frequency. The real and imaginary parts of the third-order nonlinear susceptibility $\chi$(3) at an Au concentration of about 6.7 at.% were determined to be 6.62×10-7 esu and -6.24×10-8 esu, respectively. The films showed a very large absorption, masking the nonlinear refraction effect at high metal concentrations.

Key words: Au/BaTiO3, susceptibility, z-scan, pulsed laser deposition

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
81.15.Fg (Pulsed laser ablation deposition) 79.60.Jv (Interfaces; heterostructures; nanostructures) 78.66.Sq (Composite materials) 42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)