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Non-Empirical Large-Scale Search for Optical Metasurfaces
Metasurfaces are artificially designed, on-top, thin structures on bulk substrates, realizing various functions in recent years. Most metasurfaces have been conceived of for attaining optical functions, based on elaborate human knowledge-based designs for complex structures. Here, we introduce a met...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559444/ https://www.ncbi.nlm.nih.gov/pubmed/32887266 http://dx.doi.org/10.3390/nano10091739 |
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author | Iwanaga, Masanobu |
author_facet | Iwanaga, Masanobu |
author_sort | Iwanaga, Masanobu |
collection | PubMed |
description | Metasurfaces are artificially designed, on-top, thin structures on bulk substrates, realizing various functions in recent years. Most metasurfaces have been conceived of for attaining optical functions, based on elaborate human knowledge-based designs for complex structures. Here, we introduce a method for a non-empirical, large-scale structural search to find optical metasurfaces, which enable us to access intended functions without depending on human knowledge and experience. This method is different from the optimization and modification reported so far. To illustrate the outputs in the non-empirical search, we show unpredictable, optically high-performance, all-dielectric metasurfaces found in the machine search. As an extension of the finding of a higher order diffractive structure, we furthermore show a light-focusing metadevice, which is diffraction-limited and has the unique feature that the focal length is almost invariant even when the distance from the incident spot to the metadevice largely varies. |
format | Online Article Text |
id | pubmed-7559444 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75594442020-10-26 Non-Empirical Large-Scale Search for Optical Metasurfaces Iwanaga, Masanobu Nanomaterials (Basel) Article Metasurfaces are artificially designed, on-top, thin structures on bulk substrates, realizing various functions in recent years. Most metasurfaces have been conceived of for attaining optical functions, based on elaborate human knowledge-based designs for complex structures. Here, we introduce a method for a non-empirical, large-scale structural search to find optical metasurfaces, which enable us to access intended functions without depending on human knowledge and experience. This method is different from the optimization and modification reported so far. To illustrate the outputs in the non-empirical search, we show unpredictable, optically high-performance, all-dielectric metasurfaces found in the machine search. As an extension of the finding of a higher order diffractive structure, we furthermore show a light-focusing metadevice, which is diffraction-limited and has the unique feature that the focal length is almost invariant even when the distance from the incident spot to the metadevice largely varies. MDPI 2020-09-02 /pmc/articles/PMC7559444/ /pubmed/32887266 http://dx.doi.org/10.3390/nano10091739 Text en © 2020 by the author. 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 Iwanaga, Masanobu Non-Empirical Large-Scale Search for Optical Metasurfaces |
title | Non-Empirical Large-Scale Search for Optical Metasurfaces |
title_full | Non-Empirical Large-Scale Search for Optical Metasurfaces |
title_fullStr | Non-Empirical Large-Scale Search for Optical Metasurfaces |
title_full_unstemmed | Non-Empirical Large-Scale Search for Optical Metasurfaces |
title_short | Non-Empirical Large-Scale Search for Optical Metasurfaces |
title_sort | non-empirical large-scale search for optical metasurfaces |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559444/ https://www.ncbi.nlm.nih.gov/pubmed/32887266 http://dx.doi.org/10.3390/nano10091739 |
work_keys_str_mv | AT iwanagamasanobu nonempiricallargescalesearchforopticalmetasurfaces |