High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures

High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures

A high performance polarization beam splitter (PBS) based on cascaded directional couplers (DCs) assisted by effectively anisotropic structures is proposed. The sub-wavelength grating (SWG) structures between the two coupled waveguides act as anisotropic metamaterial cladding to block/enhance light...

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Bibliographic Details
Main Authors: Kaixuan Chen, Kyoungsik Yu, Sailing He
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Photonics Journal
Subjects:
Polarization beam splitter
sub-wavelength grating
anisotropic metamaterial.
Online Access:https://ieeexplore.ieee.org/document/8884725/
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spelling doaj-831ccbae47a247a7827a311fad4804e92021-03-29T18:01:51ZengIEEEIEEE Photonics Journal1943-06552019-01-011161910.1109/JPHOT.2019.29500658884725High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic StructuresKaixuan Chen0Kyoungsik Yu1https://orcid.org/0000-0003-4901-7519Sailing He2https://orcid.org/0000-0002-3401-1125Center for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou, ChinaSchool of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South KoreaCenter for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou, ChinaA high performance polarization beam splitter (PBS) based on cascaded directional couplers (DCs) assisted by effectively anisotropic structures is proposed. The sub-wavelength grating (SWG) structures between the two coupled waveguides act as anisotropic metamaterial cladding to block/enhance light coupling for transverse electric (TE)/magnetic (TM) polarization. Cascading the DCs designed at different central wavelengths can improve the extinction ratio (ER) within the desired bandwidth or broaden the working wavelength bandwidth for TM polarization. Three design examples show the excellent performance of PBS with ER of &gt;35 dB, 20 dB or 14 dB and loss of &lt;; 0.12 dB, 0.4 dB or 0.8 dB over a bandwidth (BW) of 60 nm, 250 nm or 400 nm, which is difficult to achieve in any PBS structure reported before. The BW<sub>ER&gt;20dB</sub> of the PBS based on the cascaded DCs increases by ~11 times when compared with a single DC.https://ieeexplore.ieee.org/document/8884725/Polarization beam splittersub-wavelength gratinganisotropic metamaterial.
collection DOAJ
language English
format Article
sources DOAJ
author Kaixuan Chen
Kyoungsik Yu
Sailing He
spellingShingle Kaixuan Chen
Kyoungsik Yu
Sailing He
High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
IEEE Photonics Journal
Polarization beam splitter
sub-wavelength grating
anisotropic metamaterial.
author_facet Kaixuan Chen
Kyoungsik Yu
Sailing He
author_sort Kaixuan Chen
title High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
title_short High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
title_full High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
title_fullStr High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
title_full_unstemmed High Performance Polarization Beam Splitter Based on Cascaded Directional Couplers Assisted by Effectively Anisotropic Structures
title_sort high performance polarization beam splitter based on cascaded directional couplers assisted by effectively anisotropic structures
publisher IEEE
series IEEE Photonics Journal
issn 1943-0655
publishDate 2019-01-01
description A high performance polarization beam splitter (PBS) based on cascaded directional couplers (DCs) assisted by effectively anisotropic structures is proposed. The sub-wavelength grating (SWG) structures between the two coupled waveguides act as anisotropic metamaterial cladding to block/enhance light coupling for transverse electric (TE)/magnetic (TM) polarization. Cascading the DCs designed at different central wavelengths can improve the extinction ratio (ER) within the desired bandwidth or broaden the working wavelength bandwidth for TM polarization. Three design examples show the excellent performance of PBS with ER of &gt;35 dB, 20 dB or 14 dB and loss of &lt;; 0.12 dB, 0.4 dB or 0.8 dB over a bandwidth (BW) of 60 nm, 250 nm or 400 nm, which is difficult to achieve in any PBS structure reported before. The BW<sub>ER&gt;20dB</sub> of the PBS based on the cascaded DCs increases by ~11 times when compared with a single DC.
topic Polarization beam splitter
sub-wavelength grating
anisotropic metamaterial.
url https://ieeexplore.ieee.org/document/8884725/
work_keys_str_mv AT kaixuanchen highperformancepolarizationbeamsplitterbasedoncascadeddirectionalcouplersassistedbyeffectivelyanisotropicstructures
AT kyoungsikyu highperformancepolarizationbeamsplitterbasedoncascadeddirectionalcouplersassistedbyeffectivelyanisotropicstructures
AT sailinghe highperformancepolarizationbeamsplitterbasedoncascadeddirectionalcouplersassistedbyeffectivelyanisotropicstructures
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