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Effective electro-optic modulation in low-loss graphene-plasmonic slot waveguides

Abstract

Surface plasmon polaritons enable light concentration within subwavelength regions, opening thereby new avenues for miniaturizing the device and strengthening light-matter interactions. Here we realize effective electro-optic modulation in low-loss plasmonic waveguides with the aid of graphene, and the devices are fully integrated in the silicon-on-insulator platform. By advantageously exploiting low-loss plasmonic slot-waveguide modes, which weakly leak into a substrate while feature strong fields within the two-layer-graphene covered slots in metal, we successfully achieve a tunability of 0.13 dB/µm for our fabricated graphene-plasmonic waveguide devices with extremely low insertion loss, which outperforms previously reported graphene-plasmonic devices. Our results highlight the potential of graphene plasmonic leaky-mode hybrid waveguides to realized active ultra-compact devices for optoelectronic applications

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Publication details

The article was received on 13 Aug 2017, accepted on 15 Sep 2017 and first published on 15 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR05994A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Effective electro-optic modulation in low-loss graphene-plasmonic slot waveguides

    Y. Ding, X. Guan, X. Zhu, H. Hu, S. I. Bozhevolnyi, L. K. Oxenloewe, K. Jin, N. A. Mortensen and S. Xiao, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05994A

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