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A flexible wideband bandpass terahertz filter using multi-layer metamaterials

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Abstract

We make a flexible wideband bandpass filter at terahertz (THz) frequencies using multi-layer metamaterials. A very flat response in the passband can be obtained since the Fabry–Perot reflection inside the rigid substrate is eliminated. The center frequency is about 0.89 THz with a 3 dB bandwidth of 0.69 THz for normal incidence. The sharp band-edge transitions are 53 and 70 dB/THz to the rejection bands, respectively. The measured average insertion loss is 1.4 dB with a ripple of 0.8 dB. Furthermore, the transmission feature is insensitive to the polarization of incident wave due to the symmetric structure of the unit cell of the metamaterials. Also, it has a small change as the increase of the curvature of the flexible substrate. This result manifests that the multi-layer metamaterials can provide an effective way to design wideband THz devices.

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Acknowledgments

This work is supported by the National Basic Research Program of China (No. 2011CBA00107), National High-Tech R&D Program of China under Grant No. 2011AA010204, the National Natural Science Foundation (No. 61071009), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave.

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Authors and Affiliations

  1. Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Lanju Liang, Biaobing Jin, Jingbo Wu, Yi Huang, Xiaoqing Jia, Lin Kang, Weiwei Xu, Jian Chen & Peiheng Wu

  2. Department of Communication, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Zhihui Ye

  3. Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Xiaoming Huang, Dong Zhou, Guosheng Wang & Hai Lu

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  1. Lanju Liang
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  2. Biaobing Jin
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  4. Yi Huang
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  5. Zhihui Ye
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  13. Jian Chen
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Correspondence to Biaobing Jin.

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Liang, L., Jin, B., Wu, J. et al. A flexible wideband bandpass terahertz filter using multi-layer metamaterials. Appl. Phys. B 113, 285–290 (2013). https://doi.org/10.1007/s00340-013-5470-x

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  • DOI: https://doi.org/10.1007/s00340-013-5470-x

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