Detection of a Biexciton in Semiconducting Carbon Nanotubes Using Nonlinear Optical Spectroscopy

被引：29

作者：

Colombier, L. ^{[1
,2
]}

Selles, J. ^{[1
,2
]}

Rousseau, E. ^{[1
,2
]}

Lauret, J. S. ^{[3
]}

Vialla, F. ^{[4
]}

Voisin, C. ^{[4
]}

Cassabois, G. ^{[1
,2
]}

机构：

[1] Univ Montpellier 2, Lab Charles Coulomb, UMR5221, F-34095 Montpellier, France

[2] CNRS, Lab Charles Coulomb, UMR5221, F-34095 Montpellier, France

[3] LPQM ENS Cachan, F-94235 Cachan, France

[4] Univ Paris Diderot, UPMC, CNRS, Lab Pierre Aigrain,Ecole Normale Super,UMR8551, F-75231 Paris 5, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 19期

关键词：

EXCITONS;

D O I：

10.1103/PhysRevLett.109.197402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of the biexciton in semiconducting single-wall carbon nanotubes by means of nonlinear optical spectroscopy. Our measurements reveal the universal asymmetric line shape of the Fano resonance intrinsic to the biexciton transition. For nanotubes of the (9,7) chirality, we find a biexciton binding energy of 106 me V. From the calculation of the chi((3)) nonlinear response, we provide a quantitative interpretation of our measurements, leading to an estimation of the characteristic Fano factor q of 7 +/- 3. This value allows us to extract the first experimental information on the biexciton stability and we obtain a biexciton annihilation rate comparable to the exciton-exciton annihilation one.

引用

页数：5

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