Propagation properties of a modified surface plasmonic waveguide with an arc slot |
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| Authors: | Xue Wen-Rui Guo Ya-Nan and Zhang Wen-Mei |
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| Affiliation: | College of Physics and Electronic Engineering, Shanxi
University,
Taiyuan 030006, China |
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| Abstract: | We introduce a modified surface plasmonic waveguide with an arc
slot. The dependences of distribution of energy flux density,
effective index, propagation length and mode area of the symmetric
mode supported by this waveguide on geometrical parameters and
working wavelength are analysed by using the finite-difference
frequency-domain (FDFD) method. Results show that the energy flux
density distributes mainly in four corners which are formed by two
arcs, and the closer to the corners it is, the stronger the energy
flux density will be. The effective index, the propagation length
and the mode area are influenced by geometrical parameters,
including the width, the thickness and the arc radius of the surface
plasmonic waveguide, as well as the working wavelength. It has been
shown that the surface plasmonic waveguide with an arc slot has
better propagation properties than the surface plasmonic waveguide
with a straight slot. This work may be helpful for applying the slot
surface plasmonic waveguide to integrated photonics. |
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| Keywords: | surface plasmons optical
waveguides |
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