Graphene as broadband terahertz antireflection coating

被引：61
|
作者：
Zhou, Yixuan [1 ,2 ]
Xu, Xinlong [1 ,2 ]
Hu, Fangrong [3 ]
Zheng, Xinliang [1 ,2 ]
Li, Weilong [1 ,2 ]
Zhao, Penghui [1 ,2 ]
Bai, Jintao [1 ,2 ]
Ren, Zhaoyu [1 ,2 ]
机构：
[1] Northwest Univ, State Key Lab Incubat Base Photoelect Technol & F, Natl Photoelect Technol Funct Mat & Applicat Sci, Xian 710069, Peoples R China
[2] Northwest Univ, Inst Photon & Photon Technol, Xian 710069, Peoples R China
[3] Guilin Univ Elect Technol, Sch Elect Engn & Automat, Guilin 541004, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 05期
基金：
中国国家自然科学基金;
关键词：
SPECTROSCOPY;
D O I：
10.1063/1.4863838
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We examined the potential of stacked multilayer graphene as broadband terahertz (THz) antireflection coating based on the impedance matching effect in experiment and theory. The reflected pulses from the quartz and silicon substrates were observed to change with the layer number and doping concentration of the graphene coating. Remarkable broadband impedance matching was achieved due to optimized THz conductivity. Theoretical analysis based on Drude model and thin film Fresnel coefficients have been used to explain the experimental phenomena, which indicated the shift of Fermi level caused by chemical doping. This work paves the way for graphene-based broadband THz antireflection coating. (C) 2014 AIP Publishing LLC.
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页数：5
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