Terahertz conductivity of reduced graphene oxide films

被引：53
|
作者：
Hong, J. T. [1 ]
Lee, K. M.
Son, B. H.
Park, S. J.
Park, D. J.
Park, Ji-Yong
Lee, Soonil
Ahn, Y. H.
机构：
[1] Ajou Univ, Dept Phys, Suwon 443749, South Korea
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
HIGH-FREQUENCY; SPECTROSCOPY; TRANSPARENT; TRANSISTORS; DYNAMICS;
D O I：
10.1364/OE.21.007633
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We performed time-domain terahertz (THz) spectroscopy on reduced graphene oxide (rGO) network films coated on quartz substrates from dispersion solutions by spraying method. The rGO network films demonstrate high conductivity of about 900 S/cm in the THz frequency range after a high temperature reduction process. The frequency-dependent conductivities and the refractive indexes of the rGO films have been obtained and analyzed with respect to the Drude free-electron model, which is characterized by large scattering rate. Finally, we demonstrate that the THz conductivities can be manipulated by controlling the reduction process, which correlates well with the DC conductivity above the percolation limit. (C) 2013 Optical Society of America
引用
收藏
页码：7633 / 7640
页数：8
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