Ultrafast exciton and charge transfer in small aggregates of carbon nanotubes

被引：0

作者：

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

Crochet, J. ^{[3
]}

Hoseinkhani, S. ^{[2
]}

Hertel, T. ^{[4
]}

Cerullo, G. ^{[5
]}

Lanzani, G. ^{[6
,7
]}

机构：

[1] Madrid Inst Adv Studies IMDEA Nanociencia, Madrid, Spain

[2] ULTRAS, CNR INFM, Florence, Italy

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Univ Wurzburg, Inst Phys & Theoret Chem, Wurzburg, Germany

[5] Politecn Milan, Dipartimento Fis, Milan, Italy

[6] IIT POLIMI, Ctr Nanosci & Technol, Milan, Italy

[7] Politecn Milan, Phys Dept, \ Milan, Italy

来源：

ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS XV | 2011年 / 7937卷

关键词：

Carbon nanotubes; excitons; optoelectronics; energy transfer; charge transfer; density gradient ultracentrifugation; ENERGY-TRANSFER; DYNAMICS; SPECTRA;

D O I：

10.1117/12.877199

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We study excitation energy and charge transfer in small aggregates of chirality enriched carbon nanotubes by transient absorption spectroscopy. Ground state photobleaching is used to monitor exciton population dynamics with sub-10 fs time resolution. Upon resonant excitation of the first exciton transition in (6,5) tubes, we find evidence for energy transfer to (7,5) tubes within our time resolution (< 10 fs). After pumping at high pump energies, free charge carriers are produced via exciton scattering into the underlying continuum bands. We obtain clearly distinguished photoinduced features in the visible spectral range, that allow for real-time tracing of charge carrier dynamics in carbon nanotubes on a sub-picosecond time scale.

引用

页数：10

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