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Broadband polygonal invisibility cloak for visible light

Invisibility cloaks have recently become a topic of considerable interest thanks to the theoretical works of transformation optics and conformal mapping. The design of the cloak involves extreme values of material properties and spatially dependent parameter tensors, which are very difficult to impl...

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Detalles Bibliográficos
Autores principales: Chen, Hongsheng, Zheng, Bin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3275922/
https://www.ncbi.nlm.nih.gov/pubmed/22355767
http://dx.doi.org/10.1038/srep00255
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author Chen, Hongsheng
Zheng, Bin
author_facet Chen, Hongsheng
Zheng, Bin
author_sort Chen, Hongsheng
collection PubMed
description Invisibility cloaks have recently become a topic of considerable interest thanks to the theoretical works of transformation optics and conformal mapping. The design of the cloak involves extreme values of material properties and spatially dependent parameter tensors, which are very difficult to implement. The realization of an isolated invisibility cloak in the visible light, which is an important step towards achieving a fully movable invisibility cloak, has remained elusive. Here, we report the design and experimental demonstration of an isolated polygonal cloak for visible light. The cloak is made of several elements, whose electromagnetic parameters are designed by a linear homogeneous transformation method. Theoretical analysis shows the proposed cloak can be rendered invisible to the rays incident from all the directions. Using natural anisotropic materials, a simplified hexagonal cloak which works for six incident directions is fabricated for experimental demonstration. The performance is validated in a broadband visible spectrum.
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spelling pubmed-32759222012-02-09 Broadband polygonal invisibility cloak for visible light Chen, Hongsheng Zheng, Bin Sci Rep Article Invisibility cloaks have recently become a topic of considerable interest thanks to the theoretical works of transformation optics and conformal mapping. The design of the cloak involves extreme values of material properties and spatially dependent parameter tensors, which are very difficult to implement. The realization of an isolated invisibility cloak in the visible light, which is an important step towards achieving a fully movable invisibility cloak, has remained elusive. Here, we report the design and experimental demonstration of an isolated polygonal cloak for visible light. The cloak is made of several elements, whose electromagnetic parameters are designed by a linear homogeneous transformation method. Theoretical analysis shows the proposed cloak can be rendered invisible to the rays incident from all the directions. Using natural anisotropic materials, a simplified hexagonal cloak which works for six incident directions is fabricated for experimental demonstration. The performance is validated in a broadband visible spectrum. Nature Publishing Group 2012-02-09 /pmc/articles/PMC3275922/ /pubmed/22355767 http://dx.doi.org/10.1038/srep00255 Text en Copyright © 2012, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Chen, Hongsheng
Zheng, Bin
Broadband polygonal invisibility cloak for visible light
title Broadband polygonal invisibility cloak for visible light
title_full Broadband polygonal invisibility cloak for visible light
title_fullStr Broadband polygonal invisibility cloak for visible light
title_full_unstemmed Broadband polygonal invisibility cloak for visible light
title_short Broadband polygonal invisibility cloak for visible light
title_sort broadband polygonal invisibility cloak for visible light
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3275922/
https://www.ncbi.nlm.nih.gov/pubmed/22355767
http://dx.doi.org/10.1038/srep00255
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