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Single-Layer Terahertz Tri-band Bandpass Filter Employing High-Temperature Superconducting Metamaterial

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Abstract

In this paper, a single-layer terahertz tri-band bandpass filter without a dielectric substrate is designed using high-temperature superconductor YBa2Cu3O7−δ (YBCO) metamaterial. The proposed single-layer terahertz tri-band bandpass filter achieves its three passband resonances through the weak coupling and superposition of three sub-resonators: a cross-shaped slot resonator (CSSR), a split square ring slot resonator (SSRSR), and a split circular ring slot resonator (SCRSR). In comparison to single-layer filters designed with metallic Au metamaterial, the YBCO-based single-layer filter offers superior frequency selectivity, when the superconducting metamaterial YBCO is at a temperature of 20 K, which is below the transition temperature (Tc). Within the frequency range of 2–5 THz, the corresponding resonant frequencies for the three passbands are 2.861 THz, 3.332 THz, and 3.956 THz, all achieving transmittance exceeding 97% and remaining polarization-insensitive under vertically incident terahertz waves. The proposed single-layer superconducting metamaterial terahertz tri-band bandpass filter holds immense promise for applications in terahertz sensing technology, terahertz biomedical frequency detection, and low-cost, low-insertion-loss terahertz communication filtering devices within the terahertz spectrum.

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Data Availability

All data generated or analyzed during this study are included in this published article.

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Funding

This study is supported by the National Natural Science Foundation of China (Grant No.61275070) and Natural Science Foundation of Shanghai (Grant No. 15ZR1415900).

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Authors and Affiliations

  1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai, China

    Xianshun Cai, Zhongyin Xiao, Yulong Liu, Xinwen Wang & Pei Cheng

  2. School of Communication and Information Engineering, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China

    Xianshun Cai, Zhongyin Xiao, Yulong Liu, Xinwen Wang & Pei Cheng

Authors
  1. Xianshun Cai
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  2. Zhongyin Xiao
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  3. Yulong Liu
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  4. Xinwen Wang
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  5. Pei Cheng
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Contributions

XC: Conceptualization, Methodology, Software, Writing—Original Draft, Writing—Review Editing. ZX: Conceptualization, Validation, Writing—Review & Editing, Supervision. YL: Conceptualization, Validation, Writing—Review & Editing. XW: Software, Writing—Review Editing, Data Curation. PC: Software, Formal analysis, Investigation.

Corresponding author

Correspondence to Zhongyin Xiao.

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The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

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Cai, X., Xiao, Z., Liu, Y. et al. Single-Layer Terahertz Tri-band Bandpass Filter Employing High-Temperature Superconducting Metamaterial. J. Electron. Mater. 53, 1642–1650 (2024). https://doi.org/10.1007/s11664-023-10898-6

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