Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media

Abstract We numerically validate and experimentally realize considerable funneling of electromagnetic energy through a subwavelength aperture that is covered with an epsilon-near-zero metamaterial (ENZ). The epsilon-near-zero metamaterial is composed of two layers of metasurfaces and operates at mic...

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Autores principales:	Hodjat Hajian, Ekmel Ozbay, Humeyra Caglayan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/08fb23d9803a4edeac31c5634ee21576
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spelling	oai:doaj.org-article:08fb23d9803a4edeac31c5634ee215762021-12-02T12:30:18ZBeaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media10.1038/s41598-017-04680-y2045-2322https://doaj.org/article/08fb23d9803a4edeac31c5634ee215762017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04680-yhttps://doaj.org/toc/2045-2322Abstract We numerically validate and experimentally realize considerable funneling of electromagnetic energy through a subwavelength aperture that is covered with an epsilon-near-zero metamaterial (ENZ). The epsilon-near-zero metamaterial is composed of two layers of metasurfaces and operates at microwave frequencies. We demonstrate that the presence of the metamaterial at the inner and outer sides of the aperture not only lead to a significant enhancement in light transmission, but also cause a directional emission of light extracting from this hybrid system. In addition to these experimental results, we theoretically demonstrate the same concept in mid-IR region for a subwavelength gold aperture with indium tin oxide as an epsilon-near-zero material. Moreover, we found that using a dielectric spacer in-between the sunwavelength aperture and the ENZ medium, it is possible to red-shift the enhancement/directional frequency of the system.Hodjat HajianEkmel OzbayHumeyra CaglayanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hodjat Hajian Ekmel Ozbay Humeyra Caglayan Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
description	Abstract We numerically validate and experimentally realize considerable funneling of electromagnetic energy through a subwavelength aperture that is covered with an epsilon-near-zero metamaterial (ENZ). The epsilon-near-zero metamaterial is composed of two layers of metasurfaces and operates at microwave frequencies. We demonstrate that the presence of the metamaterial at the inner and outer sides of the aperture not only lead to a significant enhancement in light transmission, but also cause a directional emission of light extracting from this hybrid system. In addition to these experimental results, we theoretically demonstrate the same concept in mid-IR region for a subwavelength gold aperture with indium tin oxide as an epsilon-near-zero material. Moreover, we found that using a dielectric spacer in-between the sunwavelength aperture and the ENZ medium, it is possible to red-shift the enhancement/directional frequency of the system.
format	article
author	Hodjat Hajian Ekmel Ozbay Humeyra Caglayan
author_facet	Hodjat Hajian Ekmel Ozbay Humeyra Caglayan
author_sort	Hodjat Hajian
title	Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
title_short	Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
title_full	Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
title_fullStr	Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
title_full_unstemmed	Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
title_sort	beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/08fb23d9803a4edeac31c5634ee21576
work_keys_str_mv	AT hodjathajian beamingandenhancedtransmissionthroughasubwavelengthapertureviaepsilonnearzeromedia AT ekmelozbay beamingandenhancedtransmissionthroughasubwavelengthapertureviaepsilonnearzeromedia AT humeyracaglayan beamingandenhancedtransmissionthroughasubwavelengthapertureviaepsilonnearzeromedia
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Beaming and enhanced transmission through a subwavelength aperture via epsilon-near-zero media

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