Electric Field Distribution of Nanohole Thin Gold Film for Plasmonic Biosensor: Finite Element Method
M. Khammar
Center for Development of Advanced Technologies (CDTA), Research Unit in Optics and Photonics (UROP), Conception and Modeling Research team, Farhat Abbas University 1, El Bez, Setif-19000, Algeria
Abstract—In this paper, we simulate the local electric field distribution and the transmission in 20 nm thin gold films perforated by single sub-wavelength nanoholes on SiO2 dielectric substrate, immersed in air and illuminated by a perpendicular plane wave. In such nanostructure, intense electric fields are observed secure to the top and bottom nanohole edges under appropriate simulation conditions. Using Finite Element Method (FEM), we simulate the electric field distribution at resonance wavelengths in this nanostructure. More specifically, we show the diameter nanohole effect the plasmonic field enhancement in the edges. Furthermore, we study the effect of the side excitation which plays a key role in the enhancement of this field.
Index Terms—SPR sensor, nanostructure, single nanohole, FEM, side excitation, enhancement electric field
Cite: M. Khammar, "Electric Field Distribution of Nanohole Thin Gold Film for Plasmonic Biosensor: Finite Element Method," International Journal of Electronics and Electrical Engineering, Vol. 4, No. 3, pp. 268-272, June 2016. doi: 10.18178/ijeee.4.3.268-272
Cite: M. Khammar, "Electric Field Distribution of Nanohole Thin Gold Film for Plasmonic Biosensor: Finite Element Method," International Journal of Electronics and Electrical Engineering, Vol. 4, No. 3, pp. 268-272, June 2016. doi: 10.18178/ijeee.4.3.268-272
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