Please use this identifier to cite or link to this item: https://doi.org/10.1364/JOSAB.30.001426
Title: Enhanced coupling efficiency between dielectric and hybrid plasmonic waveguides
Authors: Shi, P.
Zhou, G. 
Chau, F.S. 
Issue Date: Jun-2013
Source: Shi, P., Zhou, G., Chau, F.S. (2013-06). Enhanced coupling efficiency between dielectric and hybrid plasmonic waveguides. Journal of the Optical Society of America B: Optical Physics 30 (6) : 1426-1431. ScholarBank@NUS Repository. https://doi.org/10.1364/JOSAB.30.001426
Abstract: The modal distributions and properties of dielectric and hybrid plasmonic (HP) waveguides are investigated systematically. Their coupling efficiency through a direct coupling scheme is estimated by numerical simulation and the results are compared with values predicted by the Fresnel formula. The influence of various factors on the coupling efficiency between dielectric and HP waveguides, including interface scattering, absorption caused by light coupling to the surface plasmon polariton mode, and the mismatch between the two waveguide modes, is analyzed theoretically. A tapered coupling structure with linearly varying height and width of the silicon layer is proposed, with which extremely high coupling efficiency (94.4%) and good broadband coupling performance (above 90%) are demonstrated. © 2013 Optical Society of America.
Source Title: Journal of the Optical Society of America B: Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/60175
ISSN: 07403224
DOI: 10.1364/JOSAB.30.001426
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