Excitons and high-order optical transitions in individual carbon nanotubes: A Rayleigh scattering spectroscopy study

被引：52

作者：

Berciaud, Stephane ^{[1
,2
,3
]}

Voisin, Christophe ^{[1
,2
,4
]}

Yan, Hugen ^{[1
,2
]}

Chandra, Bhupesh ^{[5
]}

Caldwell, Robert ^{[5
]}

Shan, Yuyao ^{[5
]}

Brus, Louis E. ^{[3
]}

Hone, James ^{[5
]}

Heinz, Tony F. ^{[1
,2
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[3] Columbia Univ, Dept Chem, New York, NY 10027 USA

[4] Ecole Normale Super, Lab Pierre Aigrain, F-75005 Paris, France

[5] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.81.041414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We examine the excitonic nature of high-lying optical transitions in single-walled carbon nanotubes by means of Rayleigh scattering spectroscopy. A careful analysis of the principal transitions of individual semi-conducting and metallic nanotubes reveals that in both cases the line shape is consistent with an excitonic model, but not one of free carriers. For semiconducting species, sidebands are observed at similar to 200 meV above the third and fourth optical transitions. These features are ascribed to exciton-phonon bound states. Such sidebands are not apparent for metallic nanotubes, as expected from the reduced strength of excitonic interactions in these systems.

引用

页数：4

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