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Tunable Triple-Band Plasmonically Induced Transparency Effects Based on Double π-Shaped Metamaterial Resonators

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Abstract

Tunable triple-peaks with the transmission intensity of more than 90% plasmonically induced transparency metamaterial resonator based on nested double π-shaped metallic structure is proposed at the terahertz frequency region, which is consisted of three sets of gold nanorods with different sizes placed on a dielectric substrate of SiO2. The coupling effect of localized electric field between different parts of the proposed structure can be used to explain the physical mechanism of three transparent windows. The finite-difference time-domain (FDTD) is used to study the spectral properties of the proposed structure, and the influence of the size of the nanorods and the relative distance between them on the spectral characteristics are also discussed. It can be seen that some obvious shift phenomena occur in the spectra with the change of these nanorods. These results indicate that the proposed structure opens up new avenues in many related applications, especially for multi-channel filters, optical switches, and sensors.

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Funding

This research was funded by the National Natural Science Foundation of China (11647143), Natural Science Foundation of Jiangsu (BK20160189), China Postdoctoral Science Foundation (2019M651692), Jiangsu Postdoctoral Science Foundation (2018K113C), and Fundamental Research Funds for Central Universities (JUSRP51721B).

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Authors and Affiliations

  1. School of Science, Jiangnan University, Wuxi, 214122, China

    Chao Tang, Qingshan Niu, Yuanhao He, Huaxin Zhu & Ben-Xin Wang

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  1. Chao Tang
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  2. Qingshan Niu
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  3. Yuanhao He
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  4. Huaxin Zhu
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  5. Ben-Xin Wang
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Correspondence to Ben-Xin Wang.

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Tang, C., Niu, Q., He, Y. et al. Tunable Triple-Band Plasmonically Induced Transparency Effects Based on Double π-Shaped Metamaterial Resonators. Plasmonics 15, 467–473 (2020). https://doi.org/10.1007/s11468-019-01076-8

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  • DOI: https://doi.org/10.1007/s11468-019-01076-8

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