碳纳米管悬浮液对532nm激光限幅机理的实验研究

许芹祖

许芹祖. 碳纳米管悬浮液对532nm激光限幅机理的实验研究[J]. 应用光学, 2010, 31(5): 819-824.
引用本文: 许芹祖. 碳纳米管悬浮液对532nm激光限幅机理的实验研究[J]. 应用光学, 2010, 31(5): 819-824.
XU Qin-zu. Optical limiting mechanism of suspended carbon nanotubes[J]. Journal of Applied Optics, 2010, 31(5): 819-824.
Citation: XU Qin-zu. Optical limiting mechanism of suspended carbon nanotubes[J]. Journal of Applied Optics, 2010, 31(5): 819-824.

碳纳米管悬浮液对532nm激光限幅机理的实验研究

详细信息
    通讯作者:

    许芹祖(1962-),男,山东人,副教授,主要从事光学检测和激光技术方面的教学和科研工作。

  • 中图分类号: TN241;O437

Optical limiting mechanism of suspended carbon nanotubes

  • 摘要: 通过光限幅、Z扫描、非线性吸收和散射能量分布实验,研究了碳纳米管悬浮液对532nm激光的限幅机理以及样品厚度对光限幅机理的影响。结果表明:碳纳米管悬浮液的光限幅机理并非单纯的非线性散射,对低能量入射激光光限幅特性主要源于对入射激光的非线性吸收;对高能量入射激光,碳纳米管的吸收效应和它电离形成的微等离子体以及液体汽化所形成气泡散射效应的共同作用,使其具有较强的光限幅能力,对浓度一定的悬浮液,增加样品厚度虽然会增强其限幅效果,但却会减弱其非线性散射效应。
    Abstract: Both the optical limiting mechanism of suspending liquid of multi-walled carbon nanotubes for 532nm laser and the impact of samples thickness on limiting mechanism were investigated by Z-scan test, nonlinear absorption test and nonlinear scattering test. The results show that nonlinear absorption is the main reason in optical limit for lower input energy. Nonlinear absorption of carbon nanotubes, nonlinear scattering of plasma generated by ionization and air bubble generated by solvent boiloff result in a strong limiting factor of carbon nanotubes for high input energy. With the increase of sample thickness, the limiting factor of carbon nanotubes increases, but its nonlinear scattering is reduced when the concentration of suspending liquid is fixed.
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出版历程
  • 刊出日期:  2010-09-14

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