Mr. Ming Cai Profile

Ming Cai

at Xidian Univ

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Proceedings Article | 24 January 2019 Paper

A new long-range single nanotube hybrid plasmonic waveguide

Ming Cai, Sheng Qu, Shulong Wang, Zeyu Hu, Zhenjie Wu, Hongxia Liu

Proceedings Volume 10840, 108400Q (2019) https://doi.org/10.1117/12.2512188

KEYWORDS: Waveguides, Metals, Plasmonic waveguides, Wave propagation, Radio propagation, Silicon, Light wave propagation, Nanowires, Diffraction, Heterojunctions

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In this paper, a novel long-range single nanotube hybrid plasmonic waveguide composed of a silicon nanotube and a thin metal layer embedded in it is designed. The geometry of this waveguide is much different from the conventional hybrid plasmonic waveguide such as a tube-wedge or rectangle long-range hybrid plasmonic waveguide. With strong coupling between the silicon nanowire mode and long-range surface plasmon polariton (SPP) mode, both deep subwavelength mode confinement and low propagation loss has been achieved. We evaluate the properties of the ultra-small hybrid plasmonic waveguide including propagation length (L), normalized mode area (A_eff /A0), and figure of merit (FoM). The results show that the designed hybrid plasmonic waveguide enables an ultra-small deep-subwavelength mode in a smaller area than presented long-range hybrid SPP waveguides. What’s more, the propagation length is longer than 1mm and optimization FoM of our waveguide is much larger than 10⁴, which show much better performance that of wedge or rectangle hybrid plasmonic waveguide. Finally, another significant improvement of our structure is that the area of the cross-section is about 0.05um², which is much smaller than any other presented hybrid plasmonic waveguides.

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