A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material
Integrating tunable characteristics and multiple functions into a single metasurface attracts more and more attention. Herein, a reconfigurable bifunctional metasurface is proposed to realize the switch between broadband polarization conversion and absorption. The switchable performance can be achie...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2022-09-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202100369 |
| _version_ | 1798036792834785280 |
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| author | Jiajia Chen Xieyu Chen Kuan Liu Shoujun Zhang Tun Cao Zhen Tian |
| author_facet | Jiajia Chen Xieyu Chen Kuan Liu Shoujun Zhang Tun Cao Zhen Tian |
| author_sort | Jiajia Chen |
| collection | DOAJ |
| description | Integrating tunable characteristics and multiple functions into a single metasurface attracts more and more attention. Herein, a reconfigurable bifunctional metasurface is proposed to realize the switch between broadband polarization conversion and absorption. The switchable performance can be achieved by changing the conductivity of phase‐change material Ge2Sb2Te5 (GST) in the way of heating. When the conductivity σ of GST is set to 0 Sm−1, the metasurface is a polarizer that can transform the x‐polarized wave into the y‐polarized wave in the range of 0.53–1.22 THz. Moreover, its polarization–conversion ratio (PCR) is more than 90% from 0.60 to 1.15 THz. As σ increases to 1 × 105 Sm−1, the metasurface absorbs more than 75% of the incident wave from 0.44 to 1.34 THz, which means it is a broadband absorber. In addition, the performance of the metasurface is verified by simulation, experiment, and theory. Through comparison, the three results have a high fitting degree. The reconfigurable metasurface provides a new way to develop switchable photonic devices in the terahertz frequency region. |
| first_indexed | 2024-04-11T21:17:52Z |
| format | Article |
| id | doaj.art-b31dd77482db492c8bc9c2eaf438a212 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-04-11T21:17:52Z |
| publishDate | 2022-09-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-b31dd77482db492c8bc9c2eaf438a2122022-12-22T04:02:46ZengWiley-VCHAdvanced Photonics Research2699-92932022-09-0139n/an/a10.1002/adpr.202100369A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change MaterialJiajia Chen0Xieyu Chen1Kuan Liu2Shoujun Zhang3Tun Cao4Zhen Tian5Center for Terahertz Waves and School of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China) Tianjin University Tianjin 300072 ChinaCenter for Terahertz Waves and School of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China) Tianjin University Tianjin 300072 ChinaSchool of Optoelectronic Engineering and Instrumentation Science Dalian University of Technology Dalian 116024 P. R. ChinaCenter for Terahertz Waves and School of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China) Tianjin University Tianjin 300072 ChinaSchool of Optoelectronic Engineering and Instrumentation Science Dalian University of Technology Dalian 116024 P. R. ChinaCenter for Terahertz Waves and School of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China) Tianjin University Tianjin 300072 ChinaIntegrating tunable characteristics and multiple functions into a single metasurface attracts more and more attention. Herein, a reconfigurable bifunctional metasurface is proposed to realize the switch between broadband polarization conversion and absorption. The switchable performance can be achieved by changing the conductivity of phase‐change material Ge2Sb2Te5 (GST) in the way of heating. When the conductivity σ of GST is set to 0 Sm−1, the metasurface is a polarizer that can transform the x‐polarized wave into the y‐polarized wave in the range of 0.53–1.22 THz. Moreover, its polarization–conversion ratio (PCR) is more than 90% from 0.60 to 1.15 THz. As σ increases to 1 × 105 Sm−1, the metasurface absorbs more than 75% of the incident wave from 0.44 to 1.34 THz, which means it is a broadband absorber. In addition, the performance of the metasurface is verified by simulation, experiment, and theory. Through comparison, the three results have a high fitting degree. The reconfigurable metasurface provides a new way to develop switchable photonic devices in the terahertz frequency region.https://doi.org/10.1002/adpr.202100369absorbersbifunctional metasurfacesphase-change materialspolarizersterahertz |
| spellingShingle | Jiajia Chen Xieyu Chen Kuan Liu Shoujun Zhang Tun Cao Zhen Tian A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material Advanced Photonics Research absorbers bifunctional metasurfaces phase-change materials polarizers terahertz |
| title | A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material |
| title_full | A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material |
| title_fullStr | A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material |
| title_full_unstemmed | A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material |
| title_short | A Thermally Switchable Bifunctional Metasurface for Broadband Polarization Conversion and Absorption Based on Phase‐Change Material |
| title_sort | thermally switchable bifunctional metasurface for broadband polarization conversion and absorption based on phase change material |
| topic | absorbers bifunctional metasurfaces phase-change materials polarizers terahertz |
| url | https://doi.org/10.1002/adpr.202100369 |
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