Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Luo, Kaiwen, Huang, Zhijing, Lv, Xianpeng, Qiu, Wentao, Guan, Heyuan, Yang, Tiefeng, Grosjean, Thierry, Lu, Huihui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2023
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
_version_ 1784906689559920640
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
work_keys_str_mv AT luokaiwen directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT huangzhijing directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT lvxianpeng directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT qiuwentao directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT guanheyuan directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT yangtiefeng directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT grosjeanthierry directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight
AT luhuihui directionalblochsurfacewavecouplingenabledbymagneticspinmomentumlockingoflight