• 文献标题:   Terahertz plasmonics in ferroelectric-gated graphene
  • 文献类型:   Article
  • 作  者:   JIN DF, KUMAR A, FUNG KH, XU J, FANG NX
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   MIT
  • 被引频次:   26
  • DOI:   10.1063/1.4807762
  • 出版年:   2013

▎ 摘  要

Inspired by recent advancement of ferroelectric-gated memories and transistors, we propose a design of ferroelectric-gated nanoplasmonic devices based on graphene sheets clamped in ferroelectric crystals. We show that the two-dimensional plasmons in graphene can strongly couple with the phonon-polaritons in ferroelectrics, leading to characteristic modal wavelength of the order of 100-200 nm at low temperature and low-THz frequencies albeit with an appreciable dissipation. By patterning the ferroelectrics into different domains, one can produce compact on-chip plasmonic waveguides, which exhibit negligible crosstalk even at 20 nm separation distance. Harnessing the memory effect of ferroelectrics, low-power operation can be achieved on these plasmonic waveguides. (C) 2013 AIP Publishing LLC.