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Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide

The selective polarizers play an important role in silicon-based integrated circuits. The previous polarizers based on silicon waveguides have the defects of large scale and low extinction ratio. In this work, TM- and TE-pass polarizers only 10 μm long were developed based on phase-change material o...

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Autores principales: Xie, Xuanxuan, Liu, Furong, Chen, Qingyuan, Zhang, Yongzhi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025836/
https://www.ncbi.nlm.nih.gov/pubmed/35457800
http://dx.doi.org/10.3390/mi13040495
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author Xie, Xuanxuan
Liu, Furong
Chen, Qingyuan
Zhang, Yongzhi
author_facet Xie, Xuanxuan
Liu, Furong
Chen, Qingyuan
Zhang, Yongzhi
author_sort Xie, Xuanxuan
collection PubMed
description The selective polarizers play an important role in silicon-based integrated circuits. The previous polarizers based on silicon waveguides have the defects of large scale and low extinction ratio. In this work, TM- and TE-pass polarizers only 10 μm long were developed based on phase-change material of Sc(0.2)Sb(2)Te(3) (SST) hybrid silicon waveguide, where several SST bars with a varied distance was designed. Because of the excellent characteristics of the refractive index of the material, ultra-high extinction ratios (ERs) were achieved. A 3-D finite element simulation was carried out to optimize the structure of the polarizers, and the distribution of light field, as well as the transmission behavior of TE and TM modes in the two polarizers, was further demonstrated in detail. When the SST is crystalline, the unwanted mode can be attenuated, while the wanted mode can pass through with low loss. Compared with the GST-based polarizers, the proposed ones achieved high extinction ratios of ~43.12 dB (TM-pass one) and ~44.21 dB (TE-pass one), respectively; at the same time, ILs for the wanted modes could be negligible. The design of high-performance polarizers paves a new way for applications of all-optical integrated circuits.
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spelling pubmed-90258362022-04-23 Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide Xie, Xuanxuan Liu, Furong Chen, Qingyuan Zhang, Yongzhi Micromachines (Basel) Article The selective polarizers play an important role in silicon-based integrated circuits. The previous polarizers based on silicon waveguides have the defects of large scale and low extinction ratio. In this work, TM- and TE-pass polarizers only 10 μm long were developed based on phase-change material of Sc(0.2)Sb(2)Te(3) (SST) hybrid silicon waveguide, where several SST bars with a varied distance was designed. Because of the excellent characteristics of the refractive index of the material, ultra-high extinction ratios (ERs) were achieved. A 3-D finite element simulation was carried out to optimize the structure of the polarizers, and the distribution of light field, as well as the transmission behavior of TE and TM modes in the two polarizers, was further demonstrated in detail. When the SST is crystalline, the unwanted mode can be attenuated, while the wanted mode can pass through with low loss. Compared with the GST-based polarizers, the proposed ones achieved high extinction ratios of ~43.12 dB (TM-pass one) and ~44.21 dB (TE-pass one), respectively; at the same time, ILs for the wanted modes could be negligible. The design of high-performance polarizers paves a new way for applications of all-optical integrated circuits. MDPI 2022-03-23 /pmc/articles/PMC9025836/ /pubmed/35457800 http://dx.doi.org/10.3390/mi13040495 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xie, Xuanxuan
Liu, Furong
Chen, Qingyuan
Zhang, Yongzhi
Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title_full Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title_fullStr Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title_full_unstemmed Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title_short Design of Ultra-High Extinction Ratio TM- and TE-Pass Polarizers Based on Si-Sc(0.2)Sb(2)Te(3) Hybrid Waveguide
title_sort design of ultra-high extinction ratio tm- and te-pass polarizers based on si-sc(0.2)sb(2)te(3) hybrid waveguide
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025836/
https://www.ncbi.nlm.nih.gov/pubmed/35457800
http://dx.doi.org/10.3390/mi13040495
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