Biexciton, single carrier, and trion generation dynamics in single-walled carbon nanotubes

被引：74

作者：

Yuma, B. ^{[1
,2
]}

Berciaud, S. ^{[1
,2
]}

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

Shaver, J. ^{[3
,4
]}

Santos, S. ^{[3
,4
]}

Ghosh, S. ^{[5
,6
]}

Weisman, R. B. ^{[5
,6
]}

Cognet, L. ^{[3
,4
]}

Gallart, M. ^{[1
,2
]}

Ziegler, M. ^{[1
,2
]}

Hoenerlage, B. ^{[1
,2
]}

Lounis, B. ^{[3
,4
]}

Gilliot, P. ^{[1
,2
]}

机构：

[1] CNRS, IPCMS, F-67034 Strasbourg, France

[2] Univ Strasbourg, F-67034 Strasbourg, France

[3] Univ Bordeaux, Inst Opt, Grad Sch, LP2N, F-33405 Talence, France

[4] CNRS, F-33405 Talence, France

[5] Rice Univ, Dept Chem, Houston, TX 77005 USA

[6] Rice Univ, RE Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 20期

基金：

美国国家科学基金会;

关键词：

NEGATIVELY CHARGED EXCITONS; QUANTUM-WELLS; SPECTROSCOPY; NANOCRYSTALS; TRANSITIONS; SPECTRA; PROBE; SIZE;

D O I：

10.1103/PhysRevB.87.205412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of free carrier photogeneration and multicarrier bound states, such as biexcitons and trions (charged excitons), in semiconducting single-walled carbon nanotubes. Pump-and-probe measurements performed with fs pulses reveal the effects of strong Coulomb interactions between carriers on their dynamics. Biexciton formation by optical transition from exciton population results in an induced absorption line (binding energy 130 meV). Exciton-exciton annihilation process is shown to evolve at high densities towards an Auger process that can expel carriers from nanotubes. The remaining carriers give rise to an induced absorption due to trion formation (binding energy 190 meV). These features show the dynamics of exciton and free carriers populations.

引用

页数：7

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