Abstract-Solution-processable reduced graphene oxide films as broadband terahertz wave impedance matching layers

Yixuan Zhou,   Yiwen E,   Zhaoyu Ren,   Haiming Fan,   Xin Long Xu,  Xinliang Zheng,   Dangyuan Lei,   Weilong Li,   Li Wang and  jintao bai  

J. Mater. Chem. C, 2015, Accepted Manuscript

http://pubs.rsc.org/en/content/articlelanding/2015/tc/c4tc02930e#!divAbstract
DOI: 10.1039/C4TC02930E

The potential of solution-processable reduced graphene oxide (rGO) films as wave impedance matching layers has been examined in a broad terahertz (THz) spectral bandwidth. The THz sheet conductivities of rGO fims measured by THz time-domain spectroscopy were observed to be tunable and sensitive to the film thicknesses and reduction degrees, which can be efficiently controlled by our solution-processable fabrication method. Remarkable broadband impedance matching was achieved with suitable rGO film, showing as the suppression of the internal reflected THz pulses from the substrate in the spectra. The underlying mechanisms have been revealed in both experiment and theory. This work paves the way for developing rGO-based broadband and large-scale anti-reflection layers for THz components.