DocumentCode
3862946
Title
Carrier dynamics in graphene studied by ultra-broadband optical-pump/terahertz probe spectroscpy
Author
Sho Ikeda;Masatsugu Yamashita;Chiko Otani
Author_Institution
Grad. Sch. of Sci. Tohoku Uni., 6-3 Aoba, Aramaki, Aoba, Sendai, 980-0845, Japan
fYear
2015
Firstpage
1
Lastpage
1
Abstract
Carrier dynamics in single-layered graphene has been studied by reflection-type of THz time domain spectroscopic ellipsometry (THz-TDSE) and optical-pump/THz-probe spectroscopy (OPTP). We successfully determined the frequency-dependent complex sheet conductivity of photo-excited monolayer Graphene from 0.3 to 16 THz. By analyzing with Drude model, the time dependence of Drude weight and carrier scattering rate in Graphene were estimated. It is found that Drude weight decreases and carrier scattering rate increases after photo-excitation, which contribute to the negative photoconductivity in graphene.
Keywords
"Graphene","Optical reflection","Optical scattering","Ultrafast optics","Optical pulses","Spectroscopy","Conductivity"
Publisher
ieee
Conference_Titel
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
ISSN
2162-2027
Electronic_ISBN
2162-2035
Type
conf
DOI
10.1109/IRMMW-THz.2015.7327874
Filename
7327874
Link To Document