| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Switching between the Functions of Half-Wave Plate and Quarter-Wave Plate Simply by Using a Vanadium Dioxide Film in a Terahertz Metamaterial |
| Jian-Xing Zhao1, Jian-Lin Song1, Yao Zhou1, Yi-Chao Liu1, Jian-Hong Zhou1,2** |
1School of Photoelectric Engineering, Changchun University of Science and Technology, Changchun 130022, China
2Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology (Ministry of Education), Changchun University of Science and Technology, Changchun 130022, China
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| Cite this article: |
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Jian-Xing Zhao, Jian-Lin Song, Yao Zhou et al 2020 Chin. Phys. Lett. 37 064204 |
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Abstract We propose a switchable THz metamaterial that can be switched between two functions of half-wave plate and quarter-wave plate. The two switchable functions can be simply achieved by inserting a VO$_{2}$ film in the metamaterial design. Finite-difference time-domain (FDTD) simulation results show that the proposed metamaterial can convert $x$-polarized incident wave to $y$-polarized reflected wave when VO$_{2}$ is at metal phase, and convert $x$-polarized wave to circularly polarized wave when VO$_{2}$ is at insulator phase. The metamaterial performs well in the two functions, i.e., the same broad working frequency band and near perfect polarization conversion. The switching effect originates from the switchable Fabry–Pérot cavity length induced by the phase change of VO$_{2}$. We believe that our findings provide a reference in designing switchable metamaterials.
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Received: 05 March 2020
Published: 26 May 2020
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| PACS: |
42.79.Ci
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(Filters, zone plates, and polarizers)
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42.25.Ja
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(Polarization)
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78.20.Bh
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(Theory, models, and numerical simulation)
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| Fund: *Supported by the Scientific and Technological Developing Scheme of Jilin Province (Grant No. 20180101281JC), "135" Research Project of Education Bureau of Jilin Province (Grant No. JJKH20190579KJ), and "111" Project of China (Grant No. D17017). |
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