Broadband all-silicon hybrid plasmonic TM-pass polarizer using bend waveguides

Saber, Md Ghulam, Plant, David V. and Abadía, Nicolás ORCID: https://orcid.org/0000-0002-7355-4245 2021. Broadband all-silicon hybrid plasmonic TM-pass polarizer using bend waveguides. AIP Advances 11 (4) , 045219. 10.1063/5.0044490

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Abstract

A complementary–metal–oxide semiconductor (CMOS) compatible all-silicon TM-pass polarizer using plasmonic bends is proposed. To simplify the fabrication and be compatible with the CMOS process, we employ only two materials: silicon and silicon dioxide. Highly doped silicon is used to support the plasmons. We obtain an extinction ratio and an insertion loss of 45.4 and 1.7 dB, respectively, at 1550 nm and a maximum extinction ratio of 58 dB. This is the highest reported extinction ratio for a TM-pass polarizer to the best of our knowledge. Furthermore, we achieved >20 dB of extinction ratio and <2 dB of insertion loss over 72 nm bandwidth for a device footprint <8.8 × 5.4 μm2. To achieve this, we exploit the properties of tight bends in plasmonic waveguides. Another advantage of the device is that it is robust against fabrication variations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Institute of Physics
ISSN:	2158-3226
Funders:	EPSRC
Date of First Compliant Deposit:	27 May 2021
Date of Acceptance:	7 April 2021
Last Modified:	03 May 2023 01:58
URI:	https://orca.cardiff.ac.uk/id/eprint/141609

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