volume | PIER Journals

Abstract

In this paper, equivalent circuit models are first presented for characterizing the CPW SSPPs with etched slot. The asymptotic frequency and dispersion are investigated based on the theoretical model. And the analyses reveal that both the asymptotic frequency and dispersion curve can be manipulated by changing the inductance brought by the etched slots and the capacitance of the loaded capacitors. To validate the propagation performance, the proposed SSPP structure was fabricated and tested. The experimental results are consistent with the theoretical analysis, indicating that the designed SSPP structure possesses excellent low-pass filtering characteristics. Compared with traditional SSPP structures, the proposed structure exhibits a much narrower transversal width and does not require mode-conversion structures.

1. Barnes, W. L., A. Dereux, and T. W. Ebbesen, "Surface plasmon subwavelength optics," Nature, Vol. 424, 824-830, Aug. 2003.
doi:10.1038/nature01937 Google Scholar

2. Gao, X. and T. J. Cui, "Spoof surface plasmon polaritons supported by ultrathin corrugated metal strip and their applications," Nanotechnol. Rev., Vol. 4, No. 3, 239-258, 2015. Google Scholar

3. Kianinejad, A., Z. N. Chen, and C.-W. Qiu, "Design and modeling of spoof surface plasmon modes- based microwave slow-wave transmission line," IEEE Trans. Microw. Theory Tech., Vol. 63, No. 6, 1817-1825, 2015.
doi:10.1109/TMTT.2015.2422694 Google Scholar

4. Shen, S., B. Xue, M. Yu, and J. Xu, "A novel three-dimensional integratedspoof surface plasmon polaritons transmission line," IEEE Access, Vol. 7, 26900-26908, 2019.
doi:10.1109/ACCESS.2019.2901220 Google Scholar

5. Li, J., J. Shi, K.-D. Xu, Y.-J. Guo, A. Zhang, and Q. Chen, "Spoof surface plasmon polaritons developed from coplanar waveguides in microwave frequencies," IEEE Photonics Technol. Lett., Vol. 32, No. 22, 1431-1434, 2020.
doi:10.1109/LPT.2020.3031065 Google Scholar

6. Li, J., K.-D. Xu, J. Shi, Y.-J. Guo, and A. Zhang, "Spoof surface plasmon polariton waveguide with switchable notched band," IEEE Photonics Technol. Lett., Vol. 33, No. 20, 1147-1150, 2021.
doi:10.1109/LPT.2021.3109612 Google Scholar

7. Wang, C.-M., W.-Q. Xu, L. Li, H. Liu, and Y. Kuang, "Capacitor-loaded coplanar waveguide spoof surface plasmon polariton with reduced transversal width," IEEE Photonics Technol. Lett., Vol. 35, No. 10, 557-560, 2023.
doi:10.1109/LPT.2023.3263855 Google Scholar

8. Tang, X.-L., Q. Zhang, S. Hu, A. Kandwal, T. Guo, and Y. Chen, "Capacitor-loaded spoof surface plasmon for flexible dispersion control high-selectivity filtering," IEEE Microw. Wirel. Compon. Lett., Vol. 27, No. 9, 806-808, 2017.
doi:10.1109/LMWC.2017.2734738 Google Scholar

9. Shi, Z., Y. Shen, and S. Hu, "Spoof surface plasmon polariton transmission line with reduced line-width and enhanced field confinement," Int. J. RF Microw. Comput-Aid. Eng., Vol. 30, No. 8, e22276, 2020. Google Scholar

Dr. Rui-Feng Cao

Dr. Lin Li