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THz-conductivity of CVD graphene on different substrates

机译:CVD石墨烯在不同基板上的THz电导率

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摘要

Optoelectronic properties of CVD graphene are characterized over a wide frequency range: THz, IR, visible, and near-UV. We used Raman spectroscopy to characterize the synthesized graphene films. All graphene layers were deposited on various substrates, some ones transparent or flexible, such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), quartz, and silicon. Transmission Terahertz time-domain spectroscopy (THz-TDS) method, in the range from 100 GHz to 3 THz, is used to analyze the transmittance, sheet conductivity, and attenuation of graphene and the complex refractive index of substrates. From IR, near-UV and visible spectroscopy we obtained the transmittance of the substrate and the sample at those frequency ranges, and we deduced the graphene transmittance on each substrate. We found that it is close to 97% in most cases. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机译:CVD石墨烯的光电性能可在很宽的频率范围内表征:THz,IR,可见光和近紫外光。我们使用拉曼光谱来表征合成的石墨烯薄膜。所有石墨烯层均沉积在各种透明或柔性的基材上,例如聚对苯二甲酸乙二醇酯(PET),聚萘二甲酸乙二醇酯(PEN),石英和硅。透射太赫兹时域光谱(THz-TDS)方法在100 GHz至3 THz范围内,用于分析石墨烯的透射率,薄层电导率和衰减以及基材的复折射率。从红外光谱,近紫外光谱和可见光谱中,我们获得了基板和样品在这些频率范围内的透射率,并推论出每个基板上石墨烯的透射率。我们发现在大多数情况下接近97%。 (C)2015 WILEY-VCH Verlag GmbH&Co.KGaA,Weinheim

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