可溶性多壁碳纳米管光限幅机理研究

Investigation on Optical Limiting Mechanism of Solubilized Multiwalled Carbon Nanotubes

根据光限幅与Z扫描实验研究了可溶性多壁碳纳米管的光限幅机理.通过现象分析、数据处理以及类比研究,证实材料的光限幅特征符合非线性吸收效应.对厚样品的独特现象进行了解释,讨论了其他机理的影响.根据Z扫描公式,计算了实验材料的三阶非线性系数.通过分析证实了非线性吸收在可溶性多壁碳纳米管的光限幅中发挥着主要作用.对厚介质的特殊现象进行的分析和计算表明,对于较厚介质和激光连续加热的情况下,其他机理的影响并不能完全否定,其特殊现象可能与微气泡的气穴作用有关.

Some experiments of input-output and Z-scan mechanism of solubilized multi-walled carbon nanotubes analyzed in detail and compared with the others; the were carried out to investigate the optical-limiting （M-CNTs）. The results of those experiments were conclusions revealed that the optical-limiting of solubilized M-CNTs had similar characteristics tO the nonlinear absorption effect. A particular phenomenon of thick samples in the input-output experiments was studied and the influence of other mechanisms was discussed as well. Based on Z-scan theory, the third-order nonlinear indexes of the experimental material were calculated. The analyses approved that the nonlinear absorption effect should the optical limiting of solubilized M-CNTs. But,the discussion about thick samples mechanisms could not be neglected, notably in the situation of thick medium was play a primary role in also implied that other heated continually; the particular phenomenon might be caused by the cavitation of micro bubbles.