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arXiv · 1301.5301

Ferroelectric-Gated Terahertz Plasmonics on Graphene

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

Inspired by recent advancement of low-power ferroelectic-gated memories and transistors, we propose a design of ferroelectic-gated nanoplasmonic devices based on graphene sheets clamped in ferroelectric crystals. We show that the two-dimensional plasmons in graphene strongly couple with the phonon-polaritons in ferroelectrics at terahertz frequencies, leading to characteristic modal wavelength of the order of 100--200 nm at only 3--4 THz. By patterning the ferroelectrics into different domains, one can produce compact on-chip plasmonic waveguides, which exhibit negligible crosstalk even at 50 nm separation distance. Harnessing the memory effect of ferroelectrics, low-power electro-optical switching can be achieved on these plasmonic waveguides.

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Dafei Jin, Anshuman Kumar, Kin Hung Fung, Jun Xu, Nicholas X. Fang. 2013-01-22. Ferroelectric-Gated Terahertz Plasmonics on Graphene. https://arxiv.org/abs/1301.5301

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