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Proceedings Paper

Silicon plasmonic microring modulator using embedded conducting oxides
Author(s): Aya O. Zaki; Khaled A. Kirah; Mohamed A. Swillam
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Paper Abstract

Silicon photonics offer a promising solution to high speed chip-to-chip interconnects implied by the next generation of computing and communication systems. Electro-optical modulators are the key devices enabling data to be imparted onto an optical carrier wave to propagate in silicon photonic links. Modulators that utilize transparent conducting oxides as the electro-optical active layer in hybrid plasmonic waveguides have recently received a lot of attention. However, no study has considered embedding the conducting oxide in hybrid plasmonic ring and disk structures. In this paper, we propose a novel hybrid plasmonic micro-ring modulator employing an indium-tin-oxide (ITO) layer on silicon-on-insulator (SOI) platform. A pure standard silicon access waveguide is introduced and a detailed discussion of the coupling junction design is presented. Due to its unique electro-optical properties, a unity order change in the refractive index of ITO is attainable and exploited to make a significant shift in the resonance wavelength eliminating the need for high quality factor resonance without sacrificing power consumption. Unlike conventional ring modulators, the proposed modulation mechanism uses the combined effect of changes in both the real and the imaginary parts of the refractive index to control the resonance wavelength and extinction ratio. We comprehensively study the modulator performance and the transmission spectra using FDTD simulations. Optimization of the design leads to a high modulation depth of about 20 dB for an applied voltage of 2V. The design has an estimated total capacitance less than 2 fF.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10107, Smart Photonic and Optoelectronic Integrated Circuits XIX, 101070O (20 February 2017); doi: 10.1117/12.2253628
Show Author Affiliations
Aya O. Zaki, Ain Shams Univ. (Egypt)
The American Univ. in Cairo (Egypt)
Khaled A. Kirah, Ain Shams Univ. (Egypt)
Mohamed A. Swillam, The American Univ. in Cairo (Egypt)

Published in SPIE Proceedings Vol. 10107:
Smart Photonic and Optoelectronic Integrated Circuits XIX
Louay A. Eldada; El-Hang Lee; Sailing He, Editor(s)

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