Intrinsic terahertz plasmon signatures in chemical vapour deposited graphene

作者：Shruti Badhwar, Juraj Šibík, Piran R. Kidambi, Harvey E. Beere, J. Axel Zeitler, Stephan Hofmann, D. A. Ritchie · 发表于：Applied Physics Letters · 年份：2013 · DOI：10.1063/1.4821157 · 被引用次数：14 · 研究领域：Plasmonic and Surface Plasmon Research、Photonic Crystals and Applications、Thermal Radiation and Cooling Technologies

Plasmonic resonance at terahertz (THz) frequencies can be achieved by gating graphene grown via chemical vapour deposition (CVD) to a high carrier concentration. THz time domain spectroscopy of such gated monolayer graphene shows resonance features around 1.6 THz, which appear as absorption peaks when the graphene is electrostatically p-doped and change to enhanced transmission when the graphene is n-doped. Superimposed on the Drude-like frequency response of graphene, these resonance features are related to the inherent poly-crystallinity of CVD graphene. An understanding of these features is necessary for the development of future THz optical elements based on CVD graphene.