Cargando…
Subwavelength Silicon Nanoblocks for Directional Emission Manipulation
Manipulating the light emission direction and boosting its directivity have essential importance in integrated nanophotonic devices. Here, we theoretically propose a single dielectric silicon nanoblock as an efficient, multifunctional and ultracompact all-dielectric nanoantenna to direct light into...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7353081/ https://www.ncbi.nlm.nih.gov/pubmed/32604754 http://dx.doi.org/10.3390/nano10061242 |
_version_ | 1783557791865110528 |
---|---|
author | Zhang, Tianyue Li, Xuewei Xu, Jian Zhang, Xiaoming Deng, Zi-Lan Li, Xiangping |
author_facet | Zhang, Tianyue Li, Xuewei Xu, Jian Zhang, Xiaoming Deng, Zi-Lan Li, Xiangping |
author_sort | Zhang, Tianyue |
collection | PubMed |
description | Manipulating the light emission direction and boosting its directivity have essential importance in integrated nanophotonic devices. Here, we theoretically propose a single dielectric silicon nanoblock as an efficient, multifunctional and ultracompact all-dielectric nanoantenna to direct light into a preferential direction. Unidirectional scattering of a plane wave as well as switchable directive emission fed by a localized emitter are demonstrated within the nanoantenna. The high directionalities are revealed to originate from a variety of mechanisms that can coexist within a single nanoblock, which contribute to the far-field radiation patterns of the outcoming light, thanks to the wealth of multipolar electric and magnetic resonances. The efficient beam redirections are also observed, which are sensitive to the local configurations of the emitter antenna coupled system. The designed antenna, with extreme geometry simplicity, ultracompact and low-loss features, could be favorable for highly sensitive sensing as well as applications in optical nanocircuits. |
format | Online Article Text |
id | pubmed-7353081 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-73530812020-07-15 Subwavelength Silicon Nanoblocks for Directional Emission Manipulation Zhang, Tianyue Li, Xuewei Xu, Jian Zhang, Xiaoming Deng, Zi-Lan Li, Xiangping Nanomaterials (Basel) Article Manipulating the light emission direction and boosting its directivity have essential importance in integrated nanophotonic devices. Here, we theoretically propose a single dielectric silicon nanoblock as an efficient, multifunctional and ultracompact all-dielectric nanoantenna to direct light into a preferential direction. Unidirectional scattering of a plane wave as well as switchable directive emission fed by a localized emitter are demonstrated within the nanoantenna. The high directionalities are revealed to originate from a variety of mechanisms that can coexist within a single nanoblock, which contribute to the far-field radiation patterns of the outcoming light, thanks to the wealth of multipolar electric and magnetic resonances. The efficient beam redirections are also observed, which are sensitive to the local configurations of the emitter antenna coupled system. The designed antenna, with extreme geometry simplicity, ultracompact and low-loss features, could be favorable for highly sensitive sensing as well as applications in optical nanocircuits. MDPI 2020-06-26 /pmc/articles/PMC7353081/ /pubmed/32604754 http://dx.doi.org/10.3390/nano10061242 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Tianyue Li, Xuewei Xu, Jian Zhang, Xiaoming Deng, Zi-Lan Li, Xiangping Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title | Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title_full | Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title_fullStr | Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title_full_unstemmed | Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title_short | Subwavelength Silicon Nanoblocks for Directional Emission Manipulation |
title_sort | subwavelength silicon nanoblocks for directional emission manipulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7353081/ https://www.ncbi.nlm.nih.gov/pubmed/32604754 http://dx.doi.org/10.3390/nano10061242 |
work_keys_str_mv | AT zhangtianyue subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation AT lixuewei subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation AT xujian subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation AT zhangxiaoming subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation AT dengzilan subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation AT lixiangping subwavelengthsiliconnanoblocksfordirectionalemissionmanipulation |