期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 33, 期 20, 页码 1147-1150出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2021.3109612
关键词
Resonators; Electromagnetic waveguides; Coplanar waveguides; Resonant frequency; Surface plasmon polaritons; Passband; Optical waveguides; Coplanar waveguide (CPW); low-pass filter; notch filter; spoof surface plasmon polaritons (SSPPs); switchable circuits
资金
- National Key Research and Development Program of China [2020YFA0709802]
- NSAF Joint Fund [U2130102]
- Natural Science Foundation of Shaanxi Province [2021JQ060]
- Siyuan Scholar Fellowship of XJTU
A coplanar waveguide based spoof surface plasmon polariton waveguide is proposed with strong field confinement and low-pass filtering response. Slot resonators are used to introduce a notch in the passband, and PIN diodes are added for dynamic switchability. Simulation and measurement results show good agreement.
A coplanar waveguide (CPW) based spoof surface plasmon polariton (SSPP) waveguide with strong field confinement is proposed, which has a low-pass filtering response. Then, two half-wavelength slot resonators are loaded on both sides of the SSPP waveguide to introduce a notch in the passband. Meanwhile, the SSPP waveguide with two ring slot resonators is simulated, whose results are consistent with the SSPP low-pass filter. Finally, two PIN diodes are bridged across the slits of the two resonators to realize the dynamic switchability of the notch. The waveguide functions as a notch filter when the diodes are in on-state, and a low-pass filter when the diodes are in off-state. To verify the feasibility of the design, a SSPP waveguide example is fabricated and measured, where the simulated and measured results are in reasonably good agreement.
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