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Design methodology for metal-clad polarizer in SOI waveguides

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Abstract

In this paper we give a specific design methodology for the design of a metal-clad SOI waveguide TE-pass polarizer based on phase matching between the guided TM mode of the dielectric waveguide and surface plasmon TM mode supported by a metal-dielectric interface. The design criterion explicitly shows the necessity of a high index \({\text{Si}}_{3} {\text{N}}_{4}\) layer between the silica cladding and metal. The methodology is used to design a SOI waveguide polarizer in ridge configuration. The finite element method is used to characterize the ridge waveguides and propagations. The proposed polarizer has a very short device length of 5.5 μm with extinction ratio better than 30 dB and negligible loss for the TE polarization.

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Acknowledgments

The authors would like to thank University Grants Commission (India) and Research Grants University of Delhi for financial support.

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Authors and Affiliations

  1. Department of Electronic Science, University of Delhi South Campus, New Delhi, 110021, India

    Shivani Sital & Enakshi Khular Sharma

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  1. Shivani Sital
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  2. Enakshi Khular Sharma
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Correspondence to Shivani Sital.

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This article is part of the Topical Collection on Optical Wave & Waveguide Theory and Numerical Modelling, OWTNM’15.

Guest edited by Arti Agrawal, B.M.A. Rahman, Tong Sun, Gregory Wurtz, Anibal Fernandez and James R. Taylor.

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Sital, S., Sharma, E.K. Design methodology for metal-clad polarizer in SOI waveguides. Opt Quant Electron 48, 369 (2016). https://doi.org/10.1007/s11082-016-0636-5

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