Reflective metalens with sub-diffraction-limited and multifunctional focusing

We propose an ultra-thin planar reflective metalens with sub-diffraction-limited and multifunctional focusing. Based on the equal optical path principle, the specific phase distributions for multifunction focusing are derived. Following the formulas, on-center focusing with the characteristics of su...

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Autores principales: Yang, Hui, Li, Guanhai, Su, Xiaofang, Cao, Guangtao, Zhao, Zengyue, Chen, Xiaoshuang, Lu, Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626731/
https://www.ncbi.nlm.nih.gov/pubmed/28974719
http://dx.doi.org/10.1038/s41598-017-13004-z
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author Yang, Hui
Li, Guanhai
Su, Xiaofang
Cao, Guangtao
Zhao, Zengyue
Chen, Xiaoshuang
Lu, Wei
author_facet Yang, Hui
Li, Guanhai
Su, Xiaofang
Cao, Guangtao
Zhao, Zengyue
Chen, Xiaoshuang
Lu, Wei
author_sort Yang, Hui
collection PubMed
description We propose an ultra-thin planar reflective metalens with sub-diffraction-limited and multifunctional focusing. Based on the equal optical path principle, the specific phase distributions for multifunction focusing are derived. Following the formulas, on-center focusing with the characteristics of sub-diffraction-limited, high focusing efficiency (85%) and broadband focusing is investigated in detail. To demonstrate the flexibility of the reflective metalens, off-center and dual spots focusing (at the horizontal and longitudinal directions) are demonstrated. Note that all these focusings are sub-diffraction-limited due to the evanescent-filed enhancement mechanism in our elaborately designed structure. The designed reflective metalens will find important applications in super-resolution imaging, microscopes, and spectroscopic designs.
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spelling pubmed-56267312017-10-12 Reflective metalens with sub-diffraction-limited and multifunctional focusing Yang, Hui Li, Guanhai Su, Xiaofang Cao, Guangtao Zhao, Zengyue Chen, Xiaoshuang Lu, Wei Sci Rep Article We propose an ultra-thin planar reflective metalens with sub-diffraction-limited and multifunctional focusing. Based on the equal optical path principle, the specific phase distributions for multifunction focusing are derived. Following the formulas, on-center focusing with the characteristics of sub-diffraction-limited, high focusing efficiency (85%) and broadband focusing is investigated in detail. To demonstrate the flexibility of the reflective metalens, off-center and dual spots focusing (at the horizontal and longitudinal directions) are demonstrated. Note that all these focusings are sub-diffraction-limited due to the evanescent-filed enhancement mechanism in our elaborately designed structure. The designed reflective metalens will find important applications in super-resolution imaging, microscopes, and spectroscopic designs. Nature Publishing Group UK 2017-10-03 /pmc/articles/PMC5626731/ /pubmed/28974719 http://dx.doi.org/10.1038/s41598-017-13004-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yang, Hui
Li, Guanhai
Su, Xiaofang
Cao, Guangtao
Zhao, Zengyue
Chen, Xiaoshuang
Lu, Wei
Reflective metalens with sub-diffraction-limited and multifunctional focusing
title Reflective metalens with sub-diffraction-limited and multifunctional focusing
title_full Reflective metalens with sub-diffraction-limited and multifunctional focusing
title_fullStr Reflective metalens with sub-diffraction-limited and multifunctional focusing
title_full_unstemmed Reflective metalens with sub-diffraction-limited and multifunctional focusing
title_short Reflective metalens with sub-diffraction-limited and multifunctional focusing
title_sort reflective metalens with sub-diffraction-limited and multifunctional focusing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626731/
https://www.ncbi.nlm.nih.gov/pubmed/28974719
http://dx.doi.org/10.1038/s41598-017-13004-z
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