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首页> 外文期刊>Science of advanced materials >Liquid Phase Pulsed Laser Ablation of Metal Nanoparticles for Nonlinear Optical Applications
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Liquid Phase Pulsed Laser Ablation of Metal Nanoparticles for Nonlinear Optical Applications

机译：非线性光学应用中金属纳米粒子的液相脉冲激光烧蚀

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摘要

Gold and silver nanoparticles are synthesized using liquid phase pulsed laser ablation in the water confined regime. The ablation rate of the metal is found to be increasing with decrease in work function of the metal. The particle size of the gold and silver nanoparticles can be tuned by varying the laser ablation fluence. For a particular laser ablation fluence, the size of the silver nanoparticles decreases with increase in the duration of laser ablation due to the effective radiation absorption of the previously ablated nanoparticles. The optical absorptive nonlinearity of the gold and silver nanoparticles of different sizes are analyzed using open aperture Z-scan technique. The magnitude of imaginary part of third order susceptibility increases with decrease in the size of the metal nanoparticles. This increase in the susceptibility is attributed to the enhancement of the oscillator strength per nanoparticles associated with the intra band contribution to the nonlinear absorption in metal nanoparticles.
机译：金和银纳米粒子是在水密闭状态下使用液相脉冲激光烧蚀合成的。发现金属的烧蚀速率随着金属的功函数的降低而增加。可以通过改变激光烧蚀通量来调整金和银纳米颗粒的粒径。对于特定的激光烧蚀能量密度，由于先前烧蚀的纳米颗粒的有效辐射吸收，银纳米颗粒的尺寸随着激光烧蚀持续时间的增加而减小。使用开孔Z扫描技术分析了不同大小的金和银纳米粒子的光吸收非线性。随着金属纳米颗粒尺寸的减小，三阶磁化率的虚部的大小增加。磁化率的这种增加归因于每个纳米粒子的振子强度的增强，这与金属纳米粒子中带内对非线性吸收的贡献有关。

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  • 来源
    《Science of advanced materials》 |2012年第4期|p.439-448|共10页
  • 作者

    R. Sreeja; R. Reshmi; P. M. Aneesh; M. K. Jayaraj;

  • 作者单位

    Optoelectronic Devices Laboratory, Department of Physics Cochin University of Science and Technology, Kochi 682022 Kerala, India;

    Optoelectronic Devices Laboratory, Department of Physics Cochin University of Science and Technology, Kochi 682022 Kerala, India;

    Optoelectronic Devices Laboratory, Department of Physics Cochin University of Science and Technology, Kochi 682022 Kerala, India;

    Optoelectronic Devices Laboratory, Department of Physics Cochin University of Science and Technology, Kochi 682022 Kerala, India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    liquid phase pulsed laser ablation; metal nanoparticles; nonlinear optics; z-scan method;

    机译：液相脉冲激光烧蚀;金属纳米颗粒;非线性光学z扫描法;

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