可溶性碳纳米管Z扫描实验研究

Z-scan experiment on soluble carbon nanotubes

以可溶性碳纳米管为研究对象,进行了Z扫描实验.实验中通过改变样品的参量,研究了材料在不同浓度和不同厚度下的Z扫描曲线特性;实验分别在532nm和1064nm的激光下进行,并分别进行了开孔和闭孔实验.材料的闭孔Z扫描曲线没有明显的峰谷对称结构,而开孔Z扫描曲线呈现关于原点对称的单一谷形状,表明样品存在较强的非线性吸收效应,非线性吸收可能是其主要的光限幅机理.

The Z-scan experiments were carried out to investigate the soluble carbon nanotubes. The thickness of sample is changed in order to study ＂thin＂ and ＂thick＂ sample respectively. The experiments are carried out using 8ns, 10Hz repetition rate laser pulses at 1064nm and 532nm. The transmittance curves of closed-aperture Z-scan show that nonlinear refraction is not the optical limiting mechanism of solubilized carbon nanotubes. The curves of opened-aperture Z-scan indicate that nonlinear absorption exists in this solution obviously, which may be the primary optical limiting mechanism of this material.