Ultrafast Carrier Dynamics in Graphene under a High Electric Field

被引：125
|
作者：
Tani, Shuntaro [1 ,2 ]
Blanchard, Francois [2 ,3 ]
Tanaka, Koichiro [1 ,2 ,3 ]
机构：
[1] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan
[3] Kyoto Univ, Inst Integrated Cell Mat Sci WPI iCeMS, Sakyo Ku, Kyoto 6068501, Japan
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 16期
关键词：
MULTIPLICATION; RECOMBINATION;
D O I：
10.1103/PhysRevLett.109.166603
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigated ultrafast carrier dynamics in graphene with near-infrared transient absorption measurement after intense half-cycle terahertz pulse excitation. The terahertz electric field efficiently drives the carriers, inducing large transparency in the near-infrared region. Theoretical calculations using the Boltzmann transport equation quantitatively reproduce the experimental findings. This good agreement suggests that the intense terahertz field should promote a remarkable impact ionization process and increase the carrier density.
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收藏
页数：5
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