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Issue 40, 2017
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Efficient electro-optic modulation in low-loss graphene-plasmonic slot waveguides

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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 efficient 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 featuring strong fields within the two-layer-graphene covered slots in metals, we successfully achieve a tunability of 0.13 dB μm−1 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 realize active ultra-compact devices for optoelectronic applications.

Graphical abstract: Efficient electro-optic modulation in low-loss graphene-plasmonic slot waveguides

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Article information


Submitted
13 Aug 2017
Accepted
15 Sep 2017
First published
15 Sep 2017

Nanoscale, 2017,9, 15576-15581
Article type
Paper

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

Y. Ding, X. Guan, X. Zhu, H. Hu, S. I. Bozhevolnyi, L. K. Oxenløwe, K. J. Jin, N. A. Mortensen and S. Xiao, Nanoscale, 2017, 9, 15576
DOI: 10.1039/C7NR05994A

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