交叉偏振光下碳纳米管的共振拉曼光谱

Resonance Raman spectra of carbon nanotubes by cross-polarized light.

作者信息

Jorio A, Pimenta M A, Souza Filho A G, Samsonidze Ge G, Swan A K, Unlü M S, Goldberg B B, Saito R, Dresselhaus G, Dresselhaus M S

机构信息

Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 30123-970 Brazil.

出版信息

Phys Rev Lett. 2003 Mar 14;90(10):107403. doi: 10.1103/PhysRevLett.90.107403.

DOI:10.1103/PhysRevLett.90.107403

PMID:12689031

Abstract

Resonance Raman studies on single wall carbon nanotubes (SWNTs) show that resonance with cross polarized light, i.e., with the E(mu,mu+/-1) van Hove singularities in the joint density of states needs to be taken into account when analyzing the Raman and optical absorption spectra from isolated SWNTs. This study is performed by analyzing the polarization, laser energy, and diameter dependence of two Raman features, the tangential modes (G band) and a second-order mode (G' band), at the isolated SWNT level.

摘要

对单壁碳纳米管（SWNTs）的共振拉曼研究表明，在分析孤立单壁碳纳米管的拉曼光谱和光吸收光谱时，需要考虑与交叉偏振光的共振，即与态密度联合中的E（μ，μ±1）范霍夫奇点的共振。这项研究是通过分析孤立单壁碳纳米管水平上的两个拉曼特征（切向模式（G带）和二阶模式（G'带））的偏振、激光能量和直径依赖性来进行的。