多壁碳纳米管在红外波段的散射特性研究

Electromagnetic scattering of MWCNT at infrared frequencies range

采用Bessel和Hankel函数级数模技术,对不同多壁碳纳米管在红外波段的电磁散射特性进行了研究.结果表明,不同半径、不同纳米管数目对入射的横磁波与横电波的散射现象产生不同的影响.在横磁波垂直入射时,不同结构多壁碳纳米管对其频率的选择性不明显,相同半径纳米管对横磁波的散射强度随纳米管数目的增加而增强,但其峰值不变;而在横电波入射时,不同结构多壁碳纳米管表现出强烈的频率选择性,其散射强度随半径、管数目的增加而明显增强.研究结果对利用碳纳米管进行红外波段的探测具有一定意义.

The scattering properties of multi-walled carbon Nanotubes （MWCNTs） were investigated by using modal technique based on Bessel and Hankel function.It was found that the results of scattering vary with radius and numbers of carbon nanotubes.Under transverse magnetic（TM） wave conditions,the different structure of MWCNTs is not sensitive to the frequency,and the scattering intensity on the TM wave of the same radius nanotubes increases with the increasing of the number of nanotubes.Under transverse electric（TE）wave conditions,the different structure of MWCNTs exhibit high selectivity for frequency range,and the scattering intensity increases with the increasing of the radius and number of nanotubes.It is very helpful to detect infrared wave using carbon nanotubes.