Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications
In this paper, we theoretically and numerically demonstrate a thermally controlled broadband absorber based on the phase change material Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (GST). When GST operates in the amorphous state, the proposed metamaterial acts as a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/3/272 |
| _version_ | 1827305226090053632 |
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| author | Zifeng Qiu Gui Jin Bin Tang |
| author_facet | Zifeng Qiu Gui Jin Bin Tang |
| author_sort | Zifeng Qiu |
| collection | DOAJ |
| description | In this paper, we theoretically and numerically demonstrate a thermally controlled broadband absorber based on the phase change material Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (GST). When GST operates in the amorphous state, the proposed metamaterial acts as a broadband nearly perfect absorber. The absorption can reach more than 90% in the wavelength range from 0.9 to 1.41 μm. As an application of the GST-based metamaterial absorber, the near-field imaging effect is achieved by using the intensity difference of optical absorption. Moreover, the thermally controlled switchable imaging can be performed by changing the phase transition characteristics of GST, and the imaging quality and contrast can be adjusted by changing the geometrical parameters. This designed metamaterial may have potential applications in near-infrared temperature control imaging, optical encryption, and information hiding. |
| first_indexed | 2024-04-24T17:54:38Z |
| format | Article |
| id | doaj.art-0ef7eea8eb544ba195ac5dec0aca10bf |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-04-24T17:54:38Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-0ef7eea8eb544ba195ac5dec0aca10bf2024-03-27T14:00:13ZengMDPI AGPhotonics2304-67322024-03-0111327210.3390/photonics11030272Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging ApplicationsZifeng Qiu0Gui Jin1Bin Tang2School of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, ChinaDepartment of Electronic Information and Electronic Engineering, Xiangnan University, Chenzhou 423000, ChinaSchool of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, ChinaIn this paper, we theoretically and numerically demonstrate a thermally controlled broadband absorber based on the phase change material Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (GST). When GST operates in the amorphous state, the proposed metamaterial acts as a broadband nearly perfect absorber. The absorption can reach more than 90% in the wavelength range from 0.9 to 1.41 μm. As an application of the GST-based metamaterial absorber, the near-field imaging effect is achieved by using the intensity difference of optical absorption. Moreover, the thermally controlled switchable imaging can be performed by changing the phase transition characteristics of GST, and the imaging quality and contrast can be adjusted by changing the geometrical parameters. This designed metamaterial may have potential applications in near-infrared temperature control imaging, optical encryption, and information hiding.https://www.mdpi.com/2304-6732/11/3/272metamaterialphase change materialsGe<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>perfect absorbernear-field imaging |
| spellingShingle | Zifeng Qiu Gui Jin Bin Tang Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications Photonics metamaterial phase change materials Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> perfect absorber near-field imaging |
| title | Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications |
| title_full | Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications |
| title_fullStr | Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications |
| title_full_unstemmed | Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications |
| title_short | Thermally Controlled Broadband Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>-Based Metamaterial Absorber for Imaging Applications |
| title_sort | thermally controlled broadband ge sub 2 sub sb sub 2 sub te sub 5 sub based metamaterial absorber for imaging applications |
| topic | metamaterial phase change materials Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> perfect absorber near-field imaging |
| url | https://www.mdpi.com/2304-6732/11/3/272 |
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