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Enhanced optical performance of multifocal metalens with conic shapes

A multifocal metalens, which focuses incident light at multiple foci, has many applications in imaging systems and optical communications. However, the traditional design strategy of a multifocal metalens combines several lenses that have different focal points into a planar integrated unit, resulti...

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Detalles Bibliográficos
Autores principales: Bao, Yanjun, Jiang, Qiao, Kang, Yimin, Zhu, Xing, Fang, Zheyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6061903/
https://www.ncbi.nlm.nih.gov/pubmed/30167205
http://dx.doi.org/10.1038/lsa.2017.71
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author Bao, Yanjun
Jiang, Qiao
Kang, Yimin
Zhu, Xing
Fang, Zheyu
author_facet Bao, Yanjun
Jiang, Qiao
Kang, Yimin
Zhu, Xing
Fang, Zheyu
author_sort Bao, Yanjun
collection PubMed
description A multifocal metalens, which focuses incident light at multiple foci, has many applications in imaging systems and optical communications. However, the traditional design strategy of a multifocal metalens combines several lenses that have different focal points into a planar integrated unit, resulting in low imaging quality because of the high background noise. Here we show that the defects of the traditional method can be overcome by designing a metalens with conic shapes (the ellipse and the hyperbola); this approach could improve the imaging performance and substantially decrease the background noise of multifocal metalenses. These benefits arise from the intrinsic properties of the two conic curves, which can focus incident light constructively at all of the foci of the metalens. We further demonstrate that the proposed conic-shaped metalens can function well within a broadband operation wavelength that ranges from 600 to 900 nm with the dual polarity actively controlled by the incident circular polarized light. The great agreement between the experimental and simulation results demonstrates that our proposed metalens has significant potential for use in future integrated nanophotonic devices.
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spelling pubmed-60619032018-08-30 Enhanced optical performance of multifocal metalens with conic shapes Bao, Yanjun Jiang, Qiao Kang, Yimin Zhu, Xing Fang, Zheyu Light Sci Appl Original Article A multifocal metalens, which focuses incident light at multiple foci, has many applications in imaging systems and optical communications. However, the traditional design strategy of a multifocal metalens combines several lenses that have different focal points into a planar integrated unit, resulting in low imaging quality because of the high background noise. Here we show that the defects of the traditional method can be overcome by designing a metalens with conic shapes (the ellipse and the hyperbola); this approach could improve the imaging performance and substantially decrease the background noise of multifocal metalenses. These benefits arise from the intrinsic properties of the two conic curves, which can focus incident light constructively at all of the foci of the metalens. We further demonstrate that the proposed conic-shaped metalens can function well within a broadband operation wavelength that ranges from 600 to 900 nm with the dual polarity actively controlled by the incident circular polarized light. The great agreement between the experimental and simulation results demonstrates that our proposed metalens has significant potential for use in future integrated nanophotonic devices. Nature Publishing Group 2017-10-20 /pmc/articles/PMC6061903/ /pubmed/30167205 http://dx.doi.org/10.1038/lsa.2017.71 Text en Copyright © 2017 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 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-nc-nd/4.0/
spellingShingle Original Article
Bao, Yanjun
Jiang, Qiao
Kang, Yimin
Zhu, Xing
Fang, Zheyu
Enhanced optical performance of multifocal metalens with conic shapes
title Enhanced optical performance of multifocal metalens with conic shapes
title_full Enhanced optical performance of multifocal metalens with conic shapes
title_fullStr Enhanced optical performance of multifocal metalens with conic shapes
title_full_unstemmed Enhanced optical performance of multifocal metalens with conic shapes
title_short Enhanced optical performance of multifocal metalens with conic shapes
title_sort enhanced optical performance of multifocal metalens with conic shapes
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6061903/
https://www.ncbi.nlm.nih.gov/pubmed/30167205
http://dx.doi.org/10.1038/lsa.2017.71
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