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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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/10/10/673 |
| _version_ | 1828860417595670528 |
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| author | Phuc Toan Dang Khai Q. Le Ji-Hoon Lee Truong Khang Nguyen |
| author_facet | Phuc Toan Dang Khai Q. Le Ji-Hoon Lee Truong Khang Nguyen |
| author_sort | Phuc Toan Dang |
| collection | DOAJ |
| 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-μm-thick ENZ layer between the patterned gold rectangular grating and the SiO<sub>2</sub> dielectric layer, the absorber captures >95% light over a 1.5 µm bandwidth centered at a near-8-μm 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. |
| first_indexed | 2024-12-13T02:39:34Z |
| format | Article |
| id | doaj.art-a95120917e9c4c73badd61bf57d2277b |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-13T02:39:34Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-a95120917e9c4c73badd61bf57d2277b2022-12-22T00:02:20ZengMDPI 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-μm-thick ENZ layer between the patterned gold rectangular grating and the SiO<sub>2</sub> dielectric layer, the absorber captures >95% light over a 1.5 µm bandwidth centered at a near-8-μm 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 |
| 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 |
| title | 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_short | A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces |
| title_sort | designed broadband absorber based on enz mode incorporating plasmonic metasurfaces |
| topic | epsilon-near-zero wideband absorber plasmon mode brewster mode |
| url | https://www.mdpi.com/2072-666X/10/10/673 |
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