Abstract
The improvement of excitation efficiency from free space to the longitudinal propagating plasmonic-guided wave attracts growing researchers’ interests recently. In this work, a coupling structure composed of counterpart coaxial split ring resonators and a plasmonic stripe waveguide was proposed to investigate the characteristics of the plasmonic waveguide mode excitation by using finite-difference time-domain (FDTD) method. Results showed that an extremely wide spectrum bandwidth about 930 nm which covered the communication region from 1070 nm to 2 μm was achieved and the excitation efficiencies at resonant wavelengths of 1235 nm and 1636 nm reached 36.1% and 24.5%, respectively. And the coupling wavelength can be modulated by rotating the outer split ring. Our research provides potential applications for next-generation plasmonic integrated chips and functional devices.
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Funding
This study was funded by the National Natural Science Foundation of China (NSFC) (11474041), Scientific and Technological Developing Scheme of Jilin Province (20180101281JC), “135” Research Project of Education Bureau of Jilin Province (JJKH20190579KJ), and “111” Project of China (D17017).
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Song, J., Xu, T., Zhao, J. et al. Excitation of Plasmon Waveguide Mode by Counterpart Coaxial Split Ring Resonators. Plasmonics 14, 1817–1822 (2019). https://doi.org/10.1007/s11468-019-00979-w
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DOI: https://doi.org/10.1007/s11468-019-00979-w