Ultra-wideband surface plasmonic bandpass filter with extremely wide upper-band rejection
Xue-Wei Zhang(张雪伟), Shao-Bin Liu(刘少斌)†, Qi-Ming Yu(余奇明), Ling-Ling Wang(王玲玲), Kun Liao(廖昆), and Jian Lou(娄健)
College of Electronic and Information Engineering, Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
Abstract An ultra-wideband bandpass filter (BPF) with a wide out-of-band rejection based on a surface plasmonic waveguide (SPW) slotline with ring grooves is designed and analyzed. A paired microstrip-to-slotline transition is designed for quasi-TEM to TM mode conversion by using a microstrip line with a circular pad and the slotline with the same circular slot. The mode conversion between the TM and the surface plasmon polariton (SPP) mode is realized by using a gradient slotline with ring grooves and an impedance matching technique. The upper cut-off frequencies of the passband can be adjusted by using these proposed SPP units, while the lower frequencies of the passband are created by using the microstrip-to-slotline transitions to give an ultra-wideband BPF. The dispersion curves of SPP units, electric field distribution, and the transmission spectra of the proposed ultra-wideband bandpass filter are all calculated and analyzed by the finite-difference time-domain (FDTD) method. The simulated results show that the presented filter has good performance including a wide 3-dB bandwidth of 149% from 0.57 GHz to 3.93 GHz, an extremely wide 40-dB upper-band rejection from 4.2 GHz to 18.5 GHz, and low loss and high selectivity in the passband. To prove the design validity, a prototype of the BPF has been manufactured and measured, showing a reasonable agreement with simulation results. The unique features of the proposed BPF may make it applicable for integrated circuit and plasmonic devices in microwave or THz frequency ranges.
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. U2141232, 62071221, and 62071442) and the Aeronautical Science Foundation of China (Grant No. 2019ZA037001).
Corresponding Authors:
Shao-Bin Liu
E-mail: plrg@nuaa.edu.cn,lsb@nuaa.edu.cn
Cite this article:
Xue-Wei Zhang(张雪伟), Shao-Bin Liu(刘少斌), Qi-Ming Yu(余奇明), Ling-Ling Wang(王玲玲), Kun Liao(廖昆), and Jian Lou(娄健) Ultra-wideband surface plasmonic bandpass filter with extremely wide upper-band rejection 2022 Chin. Phys. B 31 114101
[1] Barnes W L, Dereux A and Ebbesen T W 2003 Nature424 824 [2] Wang X X, Zhu J K, Tong H, Yang X D, Wu X X, Pang Z Y, Yang H and Qi Y P 2019 Chin. Phys. B28 044201 [3] Li Z Y, Yi Y T, Xu D Y, Yang H, Yi Z, Chen X F, Yi Y G, Zhang J G and Wu P H 2021 Chin. Phys. B30 098102 [4] Pendry J B, Martín-Moreno L and Garcia-Vidal F J 2004 Science305 847 [5] Hibbins A P, Evans B R and Sambles J R 2005 Science308 670 [6] Nagpal P, Lindquist N C, Oh S H and Norris D J 2009 Science325 594 [7] Williams C R, Andrews S R, Maier S A, Fernández-Domínguez A I, Martín-Moreno L and García-Vidal F J 2008 Nat. Photonics2 175 [8] Gan Q Q, Fu Z, Ding Y J and Bartoil J 2008 Phys. Rev. Lett.100 256803 [9] Tian L L, Chen Y, Liu J L, Guo K, Zhou K Y, Gao Y and Liu S T 2016 Chin. Phys. B25 078401 [10] Shen X, Cui T J, Martin-Cano D F and Garcia-Vidal J 2013 Proc. Natl. Acad. Sci. USA110 40 [11] Ma H F, Shen X P, Cheng Q, Jiang W X and Cui T J 2014 Laser Photonics Rev.8 146 [12] Tang W X, Zhang H C, Ma H F, Jiang W X and Cui T J 2019 Adv. Opt. Mater.7 1800421 [13] Xu Z, Liu S, Li S, Zhao H, Liu L and Yin X X 2018 Appl. Phys. Express11 042002 [14] Guan D F, You P, Zhang Q F, Yang Z B, Liu H W and Yong S W 2018 IEEE Trans. Microw. Theory Techn.66 2946 [15] Liu X, Zhu L and Feng Y 2016 Chin. Phys. B25 034101 [16] Tian L L, Liu J L, Zhou K Y, Gao Y and Liu S T 2017 Chin. Phys. B26 078401 [17] Zhang D, Zhang K, Wu Q, Dai R and Sha X 2018 Opt. Lett.43 3176 [18] Jidi L, Cao X, Gao J, Li S, Yang H H and Li T 2020 Appl. Phys. Express13 084004 [19] Zhang Q, Zhang H C, Wu H and Cui T J 2015 Sci. Rep.5 16531 [20] Wang J, Zhao L, Zhang C H, Shen X P and Cui T J 2019 Opt. Lett.44 3374 [21] Wang M, Sun S, Ma H F and Cui T J 2019 IEEE Trans. Microw. Theory Techn.68 732 [22] Lan S W, Weng M H, Huang C Y and Chang S J 2016 IEEE Microw. Wireless Compon. Lett.26 392 [23] Ying J G, Kai D X and Tang X 2018 Opt. Express26 10589 [24] Chen P, Li L P, Yang K and Cheng Q 2018 IEEE Microw. Wireless Compon. Lett.28 984
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