Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region
A tunable metamaterial absorber (MMA) by reversible phase transitions in a mid-infrared regime is theoretically investigated. The absorber is composed of a molybdenum (Mo)-germanium-antimony-tellurium (Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>, GST)-Mo nanodisk s...
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MDPI AG
2021-05-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/12/5/548 |
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| author | Dongdong Xu Fenping Cui Gaige Zheng |
| author_facet | Dongdong Xu Fenping Cui Gaige Zheng |
| author_sort | Dongdong Xu |
| collection | DOAJ |
| description | A tunable metamaterial absorber (MMA) by reversible phase transitions in a mid-infrared regime is theoretically investigated. The absorber is composed of a molybdenum (Mo)-germanium-antimony-tellurium (Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>, GST)-Mo nanodisk structure superimposed on the GST-Al<sub>2</sub>O<sub>3</sub> (aluminum oxide)-Mo film. Studies have shown that the combination of the inlaid metal-medium dielectric waveguide mode and the resonant cavity mode and the excitation of the propagating surface plasmon mode are the main reasons for the formation of the triple-band high absorption. Additionally, through the reversible phase change, the transition from high absorption to high reflection in the mid-infrared region is realized. The symmetry of the absorber eliminates the polarization dependence, and the near unity absorption efficiency can be maintained by incidence angles up to 60°. The presented method will enhance the functionality of the absorber and has the potential for the applications that require active control over light absorption. |
| first_indexed | 2024-03-10T11:32:08Z |
| format | Article |
| id | doaj.art-cfe309015f37449ca1f55948e2cb8c48 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T11:32:08Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj.art-cfe309015f37449ca1f55948e2cb8c482023-11-21T19:12:03ZengMDPI AGMicromachines2072-666X2021-05-0112554810.3390/mi12050548Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) RegionDongdong Xu0Fenping Cui1Gaige Zheng2Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, ChinaJiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, ChinaJiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, ChinaA tunable metamaterial absorber (MMA) by reversible phase transitions in a mid-infrared regime is theoretically investigated. The absorber is composed of a molybdenum (Mo)-germanium-antimony-tellurium (Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>, GST)-Mo nanodisk structure superimposed on the GST-Al<sub>2</sub>O<sub>3</sub> (aluminum oxide)-Mo film. Studies have shown that the combination of the inlaid metal-medium dielectric waveguide mode and the resonant cavity mode and the excitation of the propagating surface plasmon mode are the main reasons for the formation of the triple-band high absorption. Additionally, through the reversible phase change, the transition from high absorption to high reflection in the mid-infrared region is realized. The symmetry of the absorber eliminates the polarization dependence, and the near unity absorption efficiency can be maintained by incidence angles up to 60°. The presented method will enhance the functionality of the absorber and has the potential for the applications that require active control over light absorption.https://www.mdpi.com/2072-666X/12/5/548germanium-antimony-telluriumtriple-band absorbermid-infrared regimenear unity absorption |
| spellingShingle | Dongdong Xu Fenping Cui Gaige Zheng Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region Micromachines germanium-antimony-tellurium triple-band absorber mid-infrared regime near unity absorption |
| title | Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region |
| title_full | Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region |
| title_fullStr | Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region |
| title_full_unstemmed | Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region |
| title_short | Dynamically Switchable Polarization-Independent Triple-Band Perfect Metamaterial Absorber Using a Phase-Change Material in the Mid-Infrared (MIR) Region |
| title_sort | dynamically switchable polarization independent triple band perfect metamaterial absorber using a phase change material in the mid infrared mir region |
| topic | germanium-antimony-tellurium triple-band absorber mid-infrared regime near unity absorption |
| url | https://www.mdpi.com/2072-666X/12/5/548 |
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