Terahertz plasmonics in ferroelectric-gated graphene

Dafei Jin, Anshuman Kumar, Kin Hung Fung, Jun Xu, Nicholas X. Fang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article number201118
JournalApplied Physics Letters
Volume102
Issue number20
DOIs
Publication statusPublished - 20 May 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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