Ultra-high extinction ratio polarization beam splitter with extreme skin-depth waveguide
Abstract
In this Letter, we present a high extinction ratio and compact on-chip polarization beam splitter (PBS), based on an extreme skin-depth (eskid) waveguide. Subwavelength-scale gratings form an effectively anisotropic metamaterial cladding and introduce a large birefringence. The anisotropic dielectric perturbation of the metamaterial cladding suppresses the TE polarization extinction via exceptional coupling, while the large birefringence efficiently cross-couples the TM mode, thus reducing the coupling length. We demonstrated the eskid-PBS on a silicon-on-insulator platform and achieved an ultra-high extinction ratio PBS ( for TE and for TM) with a compact coupling length ( ). The insertion loss is also negligible ( ). The bandwidth is (30) nm for the TE (TM) extinction ratio . Our ultra-high extinction ratio PBS is crucial in implementing efficient polarization diversity circuits, especially where a high degree of polarization distinguishability is necessary, such as photonic quantum information processing.
- Authors:
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1779911
- Grant/Contract Number:
- 89233218CNA000001; NA-0003525
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Optics Letters
- Additional Journal Information:
- Journal Name: Optics Letters Journal Volume: 46 Journal Issue: 9; Journal ID: ISSN 0146-9592
- Publisher:
- Optical Society of America
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Ahmed, Syed Z., Ahmed, Ishtiaque, Mia, Md Borhan, Jaidye, Nafiz, and Kim, Sangsik. Ultra-high extinction ratio polarization beam splitter with extreme skin-depth waveguide. United States: N. p., 2021.
Web. doi:10.1364/OL.420824.
Ahmed, Syed Z., Ahmed, Ishtiaque, Mia, Md Borhan, Jaidye, Nafiz, & Kim, Sangsik. Ultra-high extinction ratio polarization beam splitter with extreme skin-depth waveguide. United States. https://doi.org/10.1364/OL.420824
Ahmed, Syed Z., Ahmed, Ishtiaque, Mia, Md Borhan, Jaidye, Nafiz, and Kim, Sangsik. Wed .
"Ultra-high extinction ratio polarization beam splitter with extreme skin-depth waveguide". United States. https://doi.org/10.1364/OL.420824.
@article{osti_1779911,
title = {Ultra-high extinction ratio polarization beam splitter with extreme skin-depth waveguide},
author = {Ahmed, Syed Z. and Ahmed, Ishtiaque and Mia, Md Borhan and Jaidye, Nafiz and Kim, Sangsik},
abstractNote = {In this Letter, we present a high extinction ratio and compact on-chip polarization beam splitter (PBS), based on an extreme skin-depth (eskid) waveguide. Subwavelength-scale gratings form an effectively anisotropic metamaterial cladding and introduce a large birefringence. The anisotropic dielectric perturbation of the metamaterial cladding suppresses the TE polarization extinction via exceptional coupling, while the large birefringence efficiently cross-couples the TM mode, thus reducing the coupling length. We demonstrated the eskid-PBS on a silicon-on-insulator platform and achieved an ultra-high extinction ratio PBS ( ≈ <#comment/> 60 d B for TE and ≈ <#comment/> 48 d B for TM) with a compact coupling length ( ≈ <#comment/> 14.5 µ <#comment/> m ). The insertion loss is also negligible ( < <#comment/> 0.6 d B ). The bandwidth is > <#comment/> 80 (30) nm for the TE (TM) extinction ratio > <#comment/> 20 d B . Our ultra-high extinction ratio PBS is crucial in implementing efficient polarization diversity circuits, especially where a high degree of polarization distinguishability is necessary, such as photonic quantum information processing.},
doi = {10.1364/OL.420824},
journal = {Optics Letters},
number = 9,
volume = 46,
place = {United States},
year = {Wed Apr 28 00:00:00 EDT 2021},
month = {Wed Apr 28 00:00:00 EDT 2021}
}
https://doi.org/10.1364/OL.420824
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