Terahertz radiation induced ballistic electron transport in graphene

Shuntaro Tani, François Blanchard, Koichiro Tanaka

http://arxiv.org/abs/1206.1392

(Submitted on 7 Jun 2012)

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 remarkable impact ioniza- tion process, which leads to suppression of optical phonon emission and results in efficient carrier transport in graphene.

Comments:	4 pages, 3 figures
Subjects:	Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as:	arXiv:1206.1392v1 [cond-mat.mes-hall]

Submission history

From: Shuntaro Tani [view email]
[v1] Thu, 7 Jun 2012 04:09:09 GMT (468kb)