Modal Analysis of Several Surface Plasmonic Waveguides Using a Full-Vectorial Imaginary-Distance Finite-Element Beam Propagation Method
Date Issued
2014
Date
2014
Author(s)
Lin, Chun-Hao
Abstract
Modal analysis of surface plasmon polariton (SPP) waveguides using the finite-element imaginary-distance beam propagation method (FE-ID-BPM) is discussed in this thesis. The hybridized mode, which has plasmonic mode component and photonic mode component, and leaky mode are investigated. The effective refractive indices, propagation lengths, and mode field profiles are calculated for different structure parameters. For the hybridized mode, the gap thickness of a conductor-gap-dielectric system is changed to understand its relation to the relative ratio between plasmonic and photonic components and to the propagation characteristics. For the leaky mode, the asymmetric slot waveguide is first examined to see whether the mode is purely leaky or not. Then the thickness of the strip in the metal strip waveguide is varied to examine how it affects the propagation length. Finally, some design to improve the propagation length of the metal strip waveguide is proposed.
Subjects
有限元素虛軸波束傳遞法
電漿子學
表面電漿子波導
洩漏模態
Type
thesis
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ntu-103-R01941077-1.pdf
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