Time-Resolved Picosecond Photocurrents in Contacted Carbon Nanotubes

被引：48

作者：

Prechtel, Leonhard ^{[1
,2
]}

Song, Li ^{[3
,4
]}

Manus, Stephan ^{[3
,4
]}

Schuh, Dieter ^{[5
]}

Wegscheider, Werner ^{[6
]}

Holleitner, Alexander W. ^{[1
,2
]}

机构：

[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[3] Univ Munich, Fak Phys, D-80539 Munich, Germany

[4] Univ Munich, Ctr NanoSci CeNS, D-80539 Munich, Germany

[5] Univ Regensburg, Inst Expt & Angew Phys, D-93040 Regensburg, Germany

[6] Swiss Fed Inst Technol, Festkorperphys Lab, CH-8093 Zurich, Switzerland

来源：

NANO LETTERS | 2011年 / 11卷 / 01期

关键词：

Time-resolved optoelectronic nanoscale transport; carbon nanotubes; TRANSPORT;

D O I：

10.1021/nl1036897

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We introduce coplanar stripline circuits to resolve the ultrafast photocurrent dynamics of freely suspended carbon nanotubes (CNTs) in the time domain. By applying an on-chip pump-probe laser spectroscopy, we demonstrate that CNTs, contacted by metal electrodes, exhibit a picosecond photocurrent response. We find a combination of an optically induced ultrafast displacement current, transport of photogenerated charge carriers at the Fermi velocity to the electrodes, and interband charge-carrier recombination processes to dominate the ultrafast photocurrent of the CNTs.

引用

页码：269 / 272

页数：4

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