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Tunable Terahertz Filters Based on Graphene Plasmonic All-Dielectric Metasurfaces

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Abstract

A tunable terahertz filter based on graphene plasmonic all-dielectric metasurfaces is proposed and investigated numerically by using the finite-difference time-domain (FDTD) method. Especially, hybrid all-dielectric metasurfaces are used to make a whole single-sheet graphene forms two different conductivity patterns with the same gate voltage. The simulated results show that resonance wavelength is shifted significantly with the change of gate voltage. Besides, the transmittance spectra are also shifted with the change of the width of SiC, and the filter shows a polarization-dependent modulation property for the length and the width of SiC being 480 and 320 nm, respectively. In addition, the filter can be applied for refractive sensing because the transmittance spectra are shifted with the change of the background refractive index. The study could provide availability for versatile tunable terahertz graphene plasmonic metasurfaces.

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Acknowledgments

This work is supported by National Natural Science Foundation of China (Grant No. 61275059 and No. 11674109).

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Authors and Affiliations

  1. Laboratory of Nanophotonic Functional Materials and Device (SIPSE) and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou, 510006, China

    Li-Hua Jiang, Faqiang Wang, Ruisheng Liang, Zhongchao Wei, Hongyun Meng, Hongguang Dong, Haifeng Cen, Ling Wang & Shijie Qin

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  1. Li-Hua Jiang
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  2. Faqiang Wang
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  3. Ruisheng Liang
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  4. Zhongchao Wei
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  5. Hongyun Meng
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  6. Hongguang Dong
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  7. Haifeng Cen
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  8. Ling Wang
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  9. Shijie Qin
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Correspondence to Faqiang Wang.

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Jiang, LH., Wang, F., Liang, R. et al. Tunable Terahertz Filters Based on Graphene Plasmonic All-Dielectric Metasurfaces. Plasmonics 13, 525–530 (2018). https://doi.org/10.1007/s11468-017-0539-8

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  • DOI: https://doi.org/10.1007/s11468-017-0539-8

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