期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 32, 期 23, 页码 3902-3907出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2014.2359916
关键词
Optical waveguides; photonic integrations; surface plasmons
资金
- National Key Basic Research Program of China [2013CB328704]
- National Natural Science Foundation of China [11121091, 91221304, 11134001, 11304004]
- China Postdoctoral Science Foundation [2014T70012, 2013M530462]
We propose a hybrid plasmonic waveguide that incorporates a semiconductor-insulator-metal bow-tie configuration within a low-index gap guarded by semiconductor and metallic nanostructures. Ultratight field confinement (A(eff) similar to lambda(2)/3100 - similar to lambda(2)/120) in conjunction with reasonable propagation distance (L similar to 56-138 mu m) can be achieved simultaneously at a telecommunication wavelength. Compared to a conventional hybrid waveguide, the effective mode area and propagation loss of a typical bow-tie hybrid configuration are reduced by 2-89% and 34-62%, respectively, whereas the figure of merit is enhanced by 53-700%, along with increased power ratio inside the gap region for small gap cases. Studies on fabrication tolerance, waveguide crosstalk, and loss compensation reveal its robust property for practical implementations and remarkable feasibility to realize ultracompact passive and active components. Moreover, we also reveal the broadband feature of the waveguide and show that its concept can be applicable to various other metallic configurations as well, which may open up possibilities for the inventions of numerous high-performance plasmon waveguides and components.
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