• 文献标题:   Low-Bias Active Control of Terahertz Waves by Coupling Large-Area CVD Graphene to a Terahertz Metamaterial
  • 文献类型:   Article
  • 作  者:   VALMORRA F, SCALARI G, MAISSEN C, FU WY, SCHONENBERGER C, CHOI JW, PARK HG, BECK M, FAIST J
  • 作者关键词:   terahertz, cvd graphene, metamaterial, splitring resonator, nanocircuital model, tds spectroscopy
  • 出版物名称:   NANO LETTERS
  • ISSN:   1530-6984
  • 通讯作者地址:   Swiss Fed Inst Technol
  • 被引频次:   100
  • DOI:   10.1021/nl4012547
  • 出版年:   2013

▎ 摘  要

We propose an hybrid graphene/metamaterial device based on terahertz electronic split-ring resonators directly evaporated on top of a large-area single-layer CVD graphene. Room temperature time-domain spectroscopy measurements in the frequency range from 250 GHz to 2.75 THz show that the presence of the graphene strongly changes the THz metamaterial transmittance on the whole frequency range. The graphene gating allows active control of such interaction, showing a modulation depth of 11.5% with an applied bias of 10.6 V. Analytical modeling of the device provides a very good qualitative and quantitative agreement with the measured device behavior. The presented system shows potential as a THz modulator and can be relevant for strong light-matter coupling experiments.