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/um 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.
Cite
@article{arxiv.1610.05352,
title = {Effective electro-optic modulation in low-loss graphene-plasmonic slot waveguides},
author = {Yunhong Ding and Xiaowei Guan and Xiaolong Zhu and Hao Hu and Sergey I. Bozhevolnyi and Leif Katsuo Oxenløwe and Kuijuan Jin and N. Asger Mortensen and Sanshui Xiao},
journal= {arXiv preprint arXiv:1610.05352},
year = {2017}
}
Comments
revised version with 12 pages and 4 figures