A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces

In this paper, we present a numerical study of a metamaterial absorber that provides polarization-insensitive absorption over a broad bandwidth of operation over the mid-infrared region. The absorber consists of a periodically patterned metal-dielectric-metal structure integrated with an epsilon-nea...

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Main Authors: Phuc Toan Dang, Khai Q. Le, Ji-Hoon Lee, Truong Khang Nguyen
Format: Article
Language:English
Published: MDPI AG 2019-10-01
Series:Micromachines
Subjects:
Online Access:https://www.mdpi.com/2072-666X/10/10/673
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spelling doaj-a95120917e9c4c73badd61bf57d2277b2020-11-24T22:09:34ZengMDPI AGMicromachines2072-666X2019-10-01101067310.3390/mi10100673mi10100673A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic MetasurfacesPhuc Toan Dang0Khai Q. Le1Ji-Hoon Lee2Truong Khang Nguyen3Division of Electronics Engineering, Chonbuk National University, Jeonju 54896, KoreaDivision of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City 700000, VietnamDivision of Electronics Engineering, Chonbuk National University, Jeonju 54896, KoreaDivision of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City 700000, VietnamIn this paper, we present a numerical study of a metamaterial absorber that provides polarization-insensitive absorption over a broad bandwidth of operation over the mid-infrared region. The absorber consists of a periodically patterned metal-dielectric-metal structure integrated with an epsilon-near-zero (ENZ) nanolayer into the insulating dielectric gap region. Such an anomalous broadband absorber is achieved thanks to a couple of resonant modes including plasmon and ENZ modes that are excited under mid-IR light illumination. By adding a 0.06-&#956;m-thick ENZ layer between the patterned gold rectangular grating and the SiO<sub>2</sub> dielectric layer, the absorber captures &gt;95% light over a 1.5 &#181;m bandwidth centered at a near-8-&#956;m wavelength over a wide range of oblique incidence under transverse-magnetic and -electric polarizations. The designed ENZ-based wideband absorber has potential for many practical applications, including sensing, imaging and solar energy harvesting over a wide frequency regime.https://www.mdpi.com/2072-666X/10/10/673epsilon-near-zerowideband absorberplasmon modebrewster mode
collection DOAJ
language English
format Article
sources DOAJ
author Phuc Toan Dang
Khai Q. Le
Ji-Hoon Lee
Truong Khang Nguyen
spellingShingle Phuc Toan Dang
Khai Q. Le
Ji-Hoon Lee
Truong Khang Nguyen
A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
Micromachines
epsilon-near-zero
wideband absorber
plasmon mode
brewster mode
author_facet Phuc Toan Dang
Khai Q. Le
Ji-Hoon Lee
Truong Khang Nguyen
author_sort Phuc Toan Dang
title A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
title_short A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
title_full A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
title_fullStr A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
title_full_unstemmed A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces
title_sort designed broadband absorber based on enz mode incorporating plasmonic metasurfaces
publisher MDPI AG
series Micromachines
issn 2072-666X
publishDate 2019-10-01
description In this paper, we present a numerical study of a metamaterial absorber that provides polarization-insensitive absorption over a broad bandwidth of operation over the mid-infrared region. The absorber consists of a periodically patterned metal-dielectric-metal structure integrated with an epsilon-near-zero (ENZ) nanolayer into the insulating dielectric gap region. Such an anomalous broadband absorber is achieved thanks to a couple of resonant modes including plasmon and ENZ modes that are excited under mid-IR light illumination. By adding a 0.06-&#956;m-thick ENZ layer between the patterned gold rectangular grating and the SiO<sub>2</sub> dielectric layer, the absorber captures &gt;95% light over a 1.5 &#181;m bandwidth centered at a near-8-&#956;m wavelength over a wide range of oblique incidence under transverse-magnetic and -electric polarizations. The designed ENZ-based wideband absorber has potential for many practical applications, including sensing, imaging and solar energy harvesting over a wide frequency regime.
topic epsilon-near-zero
wideband absorber
plasmon mode
brewster mode
url https://www.mdpi.com/2072-666X/10/10/673
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