Ultrafast Carrier Dynamics in Graphite

被引：397

作者：

Breusing, Markus ^{[1
]}

Ropers, Claus ^{[1
,2
]}

Elsaesser, Thomas ^{[1
]}

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Univ Gottingen, Courant Res Ctr Nanospect & Xray Imaging, D-3400 Gottingen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 08期

关键词：

GRAPHENE;

D O I：

10.1103/PhysRevLett.102.086809

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical pump-probe spectroscopy with 7-fs pump pulses and a probe spectrum wider than 0.7 eV reveals the ultrafast carrier dynamics in freestanding thin graphite films. We discern for the first time a rapid intraband carrier equilibration within 30 fs, leaving the system with separated electron and hole chemical potentials. Phonon-mediated intraband cooling of electrons and holes occurs on a 100 fs time scale. The kinetics are in agreement with simulations based on Boltzmann equations.

引用

页数：4

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