Ultracompact vanadium dioxide dual-mode plasmonic waveguide electroabsorption modulator
Ooi, Kelvin J. A.
Chu, Hong Son
Ang, L. K.
Date of Issue2013-02-12
School of Electrical and Electronic Engineering
Subwavelength modulators play an indispensable role in integrated photonic-electronic circuits. Due to weak light-matter interactions, it is always a challenge to develop a modulator with a nanometer scale footprint, low switching energy, low insertion loss and large modulation depth. In this paper, we propose the design of a vanadium dioxide dual-mode plasmonic waveguide electroabsorption modulator using a metal-insulator-VO2-insulator-metal (MIVIM) waveguide platform. By varying the index of vanadium dioxide, the modulator can route plasmonic waves through the low-loss dielectric insulator layer during the “on” state and high-loss VO2 layer during the “off” state, thereby significantly reducing the insertion loss while maintaining a large modulation depth. This ultracompact waveguide modulator, for example, can achieve a large modulation depth of ~10 dB with an active size of only 200×50×220 nm3 (or ~λ3/1700), requiring a drive-voltage of ~4.6 V. This high performance plasmonic modulator could potentially be one of the keys towards fully-integrated plasmonic nanocircuits in the next-generation chip technology.
© 2013 Science Wise Publishing & De Gruyter. This paper was published in Nanophotonics and is made available as an electronic reprint (preprint) with permission of Science Wise Publishing & De Gruyter. The published version is available at: [http://dx.doi.org/10.1515/nanoph-2012-0028]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.