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A Simple Design of a Multi-Band Terahertz Metamaterial Absorber Based on Periodic Square Metallic Layer with T-Shaped Gap

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Abstract

We present a multi-band terahertz absorber formed by periodic square metallic ribbon with T-shaped gap and a metallic ground plane separated by a dielectric layer. It is demonstrated that absorption spectra of the proposed structure consist of four absorption peaks located at 1.12, 2.49, 3.45, and 3.91 THz with high absorption coefficients of 98.0, 98.9, 98.7, and 99.6%, respectively. It is demonstrated that the proposed absorber has the tunability from single-band to broadband by changing the length of square metallic ribbon and we can also select or tune the frequencies which we want to use by changing polarization angles. Importantly, the quality factor Q at 3.91 THz is 30.1, which is 5.6 times higher than that of 1.12 THz. These results indicate that the proposed absorber has a promising potential for devices, such as detection, sensing, and imaging.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61505052, 11074069, 61176116).

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Authors and Affiliations

  1. School of Physics and Electronic, Hunan University, Changsha, 410082, China

    Hai-Yu Meng, Ling-Ling Wang, Xiang Zhai, Gui-Dong Liu & Sheng-Xuan Xia

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  1. Hai-Yu Meng
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  2. Ling-Ling Wang
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  3. Xiang Zhai
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  4. Gui-Dong Liu
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  5. Sheng-Xuan Xia
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Correspondence to Xiang Zhai.

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Meng, HY., Wang, LL., Zhai, X. et al. A Simple Design of a Multi-Band Terahertz Metamaterial Absorber Based on Periodic Square Metallic Layer with T-Shaped Gap. Plasmonics 13, 269–274 (2018). https://doi.org/10.1007/s11468-017-0509-1

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  • DOI: https://doi.org/10.1007/s11468-017-0509-1

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