Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques

Abstract The synthesis of non-magnetic 2D dielectric cloaks as proper solutions of an inverse scattering problem is addressed in this paper. Adopting the relevant integral formulation governing the scattering phenomena, analytic and numerical approaches are exploited to provide new insights on how f...

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Autores principales:	Loreto Di Donato, Tommaso Isernia, Giuseppe Labate, Ladislau Matekovits
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/05bb054eaaf6403d824662a51215097e
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spelling	oai:doaj.org-article:05bb054eaaf6403d824662a51215097e2021-12-02T16:08:23ZTowards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques10.1038/s41598-017-03749-y2045-2322https://doaj.org/article/05bb054eaaf6403d824662a51215097e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03749-yhttps://doaj.org/toc/2045-2322Abstract The synthesis of non-magnetic 2D dielectric cloaks as proper solutions of an inverse scattering problem is addressed in this paper. Adopting the relevant integral formulation governing the scattering phenomena, analytic and numerical approaches are exploited to provide new insights on how frequency and direction of arrival of the incoming wave may influence the cloaking mechanism in terms of permittivity distribution within the cover region. In quasi-static (subwavelength) regime a solution is analytically derived in terms of homogeneous artificial dielectric cover with ε < ε 0, which is found to be a necessary and sufficient condition for achieving omnidirectional cloaking. On the other hand, beyond quasi-static regime, the cloaking problem is addressed as an optimization task looking for only natural dielectric coatings with ε > ε 0 able to hide the object for a given number of directions of the incident field. Simulated results confirm the validity of both analytic and numerical methodologies and allow to estimate effective bandwidths both in terms of frequency range and direction of arrival of the impinging field.Loreto Di DonatoTommaso IserniaGiuseppe LabateLadislau MatekovitsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Loreto Di Donato Tommaso Isernia Giuseppe Labate Ladislau Matekovits Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
description	Abstract The synthesis of non-magnetic 2D dielectric cloaks as proper solutions of an inverse scattering problem is addressed in this paper. Adopting the relevant integral formulation governing the scattering phenomena, analytic and numerical approaches are exploited to provide new insights on how frequency and direction of arrival of the incoming wave may influence the cloaking mechanism in terms of permittivity distribution within the cover region. In quasi-static (subwavelength) regime a solution is analytically derived in terms of homogeneous artificial dielectric cover with ε < ε 0, which is found to be a necessary and sufficient condition for achieving omnidirectional cloaking. On the other hand, beyond quasi-static regime, the cloaking problem is addressed as an optimization task looking for only natural dielectric coatings with ε > ε 0 able to hide the object for a given number of directions of the incident field. Simulated results confirm the validity of both analytic and numerical methodologies and allow to estimate effective bandwidths both in terms of frequency range and direction of arrival of the impinging field.
format	article
author	Loreto Di Donato Tommaso Isernia Giuseppe Labate Ladislau Matekovits
author_facet	Loreto Di Donato Tommaso Isernia Giuseppe Labate Ladislau Matekovits
author_sort	Loreto Di Donato
title	Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
title_short	Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
title_full	Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
title_fullStr	Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
title_full_unstemmed	Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques
title_sort	towards printable natural dielectric cloaks via inverse scattering techniques
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/05bb054eaaf6403d824662a51215097e
work_keys_str_mv	AT loretodidonato towardsprintablenaturaldielectriccloaksviainversescatteringtechniques AT tommasoisernia towardsprintablenaturaldielectriccloaksviainversescatteringtechniques AT giuseppelabate towardsprintablenaturaldielectriccloaksviainversescatteringtechniques AT ladislaumatekovits towardsprintablenaturaldielectriccloaksviainversescatteringtechniques
_version_	1718384511557828608

Towards Printable Natural Dielectric Cloaks via Inverse Scattering Techniques

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