期刊
OPTICS COMMUNICATIONS
卷 414, 期 -, 页码 16-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2017.12.083
关键词
Surface plasmon polaritons; Waveguides; Filters
类别
资金
- National Key R&D Program of China [2017YFA0303800]
- National Natural Science Foundation of China [11634010, 61705186, 11774290, 61377035]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ1023]
- Technology Foundation for Selected Overseas Chinese Scholar of Shaanxi Province [2017007]
- Fundamental Research Funds for the Central Universities [3102016OQD031]
We propose and investigate a new kind of bandpass filters based on the plasmonically induced transparency (PIT) effect in a special metal-insulator-metal (MIM) waveguide system. The finite element method (FEM) simulations illustrate that the obvious PIT response can be generated in the metallic nanostructure with the stub and coupled cavities. The lineshape and position of the PIT peak are particularly dependent on the lengths of the stub and coupled cavities, the waveguide width, as well as the coupling distance between the stub and coupled cavities. The numerical simulations are in accordance with the results obtained by the temporal coupled-mode theory. The multi-peak PIT effect can be achieved by integrating multiple coupled cavities into the plasmonic waveguide. This PIT response contributes to the flexible realization of chip-scale multi-channel bandpass filters, which could find crucial applications in highly integrated optical circuits for signal processing. (C) 2018 Elsevier B.V. All rights reserved.
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