Cargando…
Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers
High refractive index dielectric nanoparticles show high promise as a complementary nanophotonics platform due to compared with plasmonic nanostructures low absorption losses and the co-existence of magnetic and electric resonances. Here we explore their use as resonantly enhanced directional scatte...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674758/ https://www.ncbi.nlm.nih.gov/pubmed/26656864 http://dx.doi.org/10.1038/srep18322 |
_version_ | 1782404945126883328 |
---|---|
author | Albella, Pablo Shibanuma, Toshihiko Maier, Stefan A. |
author_facet | Albella, Pablo Shibanuma, Toshihiko Maier, Stefan A. |
author_sort | Albella, Pablo |
collection | PubMed |
description | High refractive index dielectric nanoparticles show high promise as a complementary nanophotonics platform due to compared with plasmonic nanostructures low absorption losses and the co-existence of magnetic and electric resonances. Here we explore their use as resonantly enhanced directional scatterers. We theoretically demonstrate that an asymmetric dimer of silicon nanoparticles shows tuneable directional scattering depending on the frequency of excitation. This is due to the interference between electric and magnetic dipoles excited in each nanoparticle, enabling directional control of the scattered light. Interestingly, this control can be achieved regardless of the polarization direction with respect to the dimer axis; however, difference in the polarization can shift the wavelengths at which the directional scattering is achieved. We also explore the application of such an asymmetric nanoantenna as a tuneable routing element in a nanometer scale, suggesting applications in optical nanocircuitry. |
format | Online Article Text |
id | pubmed-4674758 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46747582015-12-16 Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers Albella, Pablo Shibanuma, Toshihiko Maier, Stefan A. Sci Rep Article High refractive index dielectric nanoparticles show high promise as a complementary nanophotonics platform due to compared with plasmonic nanostructures low absorption losses and the co-existence of magnetic and electric resonances. Here we explore their use as resonantly enhanced directional scatterers. We theoretically demonstrate that an asymmetric dimer of silicon nanoparticles shows tuneable directional scattering depending on the frequency of excitation. This is due to the interference between electric and magnetic dipoles excited in each nanoparticle, enabling directional control of the scattered light. Interestingly, this control can be achieved regardless of the polarization direction with respect to the dimer axis; however, difference in the polarization can shift the wavelengths at which the directional scattering is achieved. We also explore the application of such an asymmetric nanoantenna as a tuneable routing element in a nanometer scale, suggesting applications in optical nanocircuitry. Nature Publishing Group 2015-12-10 /pmc/articles/PMC4674758/ /pubmed/26656864 http://dx.doi.org/10.1038/srep18322 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Albella, Pablo Shibanuma, Toshihiko Maier, Stefan A. Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title | Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title_full | Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title_fullStr | Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title_full_unstemmed | Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title_short | Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
title_sort | switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674758/ https://www.ncbi.nlm.nih.gov/pubmed/26656864 http://dx.doi.org/10.1038/srep18322 |
work_keys_str_mv | AT albellapablo switchabledirectionalscatteringofelectromagneticradiationwithsubwavelengthasymmetricsilicondimers AT shibanumatoshihiko switchabledirectionalscatteringofelectromagneticradiationwithsubwavelengthasymmetricsilicondimers AT maierstefana switchabledirectionalscatteringofelectromagneticradiationwithsubwavelengthasymmetricsilicondimers |