A novel long-range hybrid insulator-metal-insulator plasmonic waveguide with tight light confinement

Sheng Qu; Lu Dong; Congcong Ma; Lei Wu; Shulong Wang; Hongxia Liu

doi:10.1117/12.2268786

28 February 2017 A novel long-range hybrid insulator-metal-insulator plasmonic waveguide with tight light confinement

Sheng Qu, Lu Dong, Congcong Ma, Lei Wu, Shulong Wang, Hongxia Liu

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102560B (2017) https://doi.org/10.1117/12.2268786
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

The paper presents a novel long-range hybrid insulator-metal-insulator (IMI) plasmonic waveguide, which is composed of two silicon wedge nanowires and a cylinder metal nanowire. Compared with other hybrid plasmonic waveguide, the proposed waveguide shows better properties. 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 have been achieved. The properties of the hybrid IMI plasmonic waveguide including propagation length (L), normalized mode area (A_eff /A₀) and figure of merit (FoM) are evaluated. Compared with the hybrid plasmonic waveguides, the designed waveguide enables an ultra-small deep-subwavelength mode in smaller area. The propagation length is nearly 1mm and FoM is ~10⁴, which is larger than that of wedge or rectangle hybrid plasmonic waveguides. We also evaluate the impacts of practical fabrication imperfections on the mode properties. The results show that the proposed waveguide is fairly tolerant to the practical fabrication errors in geometry parameters. The proposed waveguide has many potential applications for nano-photonic components of high performance.

Citation Download Citation

Sheng Qu, Lu Dong, Congcong Ma, Lei Wu, Shulong Wang, and Hongxia Liu "A novel long-range hybrid insulator-metal-insulator plasmonic waveguide with tight light confinement", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102560B (28 February 2017); https://doi.org/10.1117/12.2268786

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