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中文摘要：
用化学气相沉积法制备了多壁碳纳米管，经扫描电镜分析得其具有较好的形貌和结构。研究了该多壁碳纳米管对波长1064nm激光的光限幅性质，发现该样品具有非常明显的光限幅特性，激发态吸收截面为σE=：：3．32×10^-17cm^2。应用Z-扫描（Z—scan）技术研究表明，碳纳米管的光限幅机制主要为激发态吸收。
英文摘要：
The multiwalled carbon nanotubes （MWNTs） were synthesized by a chemical vapor deposition method and the SEM graph shows that the sample has good construe. The optical limiting properties of MWNTs were investigated with 1 064nm laser. MWNTs has perfect optical limiting property and the excite-state absorption cross-section was 3.32× 10^-17 cm^2. The experiments by Z- scan indicate that the phenomenon is mainly attributed to the excited state absorption.
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