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Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light
We study the magnetic spin-locking of optical surface waves. Through an angular spectrum approach and numerical simulations, we predict that a spinning magnetic dipole develops a directional coupling of light to transverse electric (TE) polarized Bloch surface waves (BSWs). A high-index nanoparticle...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10012835/ https://www.ncbi.nlm.nih.gov/pubmed/36926573 http://dx.doi.org/10.1039/d2na00899h |
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author | Luo, Kaiwen Huang, Zhijing Lv, Xianpeng Qiu, Wentao Guan, Heyuan Yang, Tiefeng Grosjean, Thierry Lu, Huihui |
author_facet | Luo, Kaiwen Huang, Zhijing Lv, Xianpeng Qiu, Wentao Guan, Heyuan Yang, Tiefeng Grosjean, Thierry Lu, Huihui |
author_sort | Luo, Kaiwen |
collection | PubMed |
description | We study the magnetic spin-locking of optical surface waves. Through an angular spectrum approach and numerical simulations, we predict that a spinning magnetic dipole develops a directional coupling of light to transverse electric (TE) polarized Bloch surface waves (BSWs). A high-index nanoparticle as a magnetic dipole and nano-coupler is placed on top of a one-dimensional photonic crystal to couple light into BSWs. Upon circularly polarized illumination, it mimics the spinning magnetic dipole. We find that the helicity of the light impinging on the nano-coupler controls the directionality of emerging BSWs. Furthermore, identical silicon strip waveguides are configured on the two sides of the nano-coupler to confine and guide the BSWs. We achieve a directional nano-routing of BSWs with circularly polarized illumination. Such a directional coupling phenomenon is proved to be solely mediated by the optical magnetic field. This offers opportunities for directional switching and polarization sorting by controlling optical flows in ultra-compact architectures and enables the investigation of the magnetic polarization properties of light. |
format | Online Article Text |
id | pubmed-10012835 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | RSC |
record_format | MEDLINE/PubMed |
spelling | pubmed-100128352023-03-15 Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light Luo, Kaiwen Huang, Zhijing Lv, Xianpeng Qiu, Wentao Guan, Heyuan Yang, Tiefeng Grosjean, Thierry Lu, Huihui Nanoscale Adv Chemistry We study the magnetic spin-locking of optical surface waves. Through an angular spectrum approach and numerical simulations, we predict that a spinning magnetic dipole develops a directional coupling of light to transverse electric (TE) polarized Bloch surface waves (BSWs). A high-index nanoparticle as a magnetic dipole and nano-coupler is placed on top of a one-dimensional photonic crystal to couple light into BSWs. Upon circularly polarized illumination, it mimics the spinning magnetic dipole. We find that the helicity of the light impinging on the nano-coupler controls the directionality of emerging BSWs. Furthermore, identical silicon strip waveguides are configured on the two sides of the nano-coupler to confine and guide the BSWs. We achieve a directional nano-routing of BSWs with circularly polarized illumination. Such a directional coupling phenomenon is proved to be solely mediated by the optical magnetic field. This offers opportunities for directional switching and polarization sorting by controlling optical flows in ultra-compact architectures and enables the investigation of the magnetic polarization properties of light. RSC 2023-02-06 /pmc/articles/PMC10012835/ /pubmed/36926573 http://dx.doi.org/10.1039/d2na00899h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Luo, Kaiwen Huang, Zhijing Lv, Xianpeng Qiu, Wentao Guan, Heyuan Yang, Tiefeng Grosjean, Thierry Lu, Huihui Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title | Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title_full | Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title_fullStr | Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title_full_unstemmed | Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title_short | Directional Bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
title_sort | directional bloch surface wave coupling enabled by magnetic spin-momentum locking of light |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10012835/ https://www.ncbi.nlm.nih.gov/pubmed/36926573 http://dx.doi.org/10.1039/d2na00899h |
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