Tuning of Plasmonic Nanoparticle and Surface Enhanced Wavelength Shifting of a Nanosystem Sensing Using 3-D-FDTD Method

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In this paper, we have used in-house the 3-D finite-difference time-domain method to analyze a novel design of metallic nanoparticles based on a sensing nanosystem. The proposed structure is composed of two gold-nanocylinders of finite height with varying radii separated by a nanogap. We have demonstrated that tunable plasmonic nanoparticles can be controlled by varying the size of the interparticles separation distance. By engineering the nanogaps, it is shown that a strong enhancement of the electric field is achieved. Our simulations show a pronounced wavelength shift for small nanogaps. In addition, the influence of the refractive index of the surrounding medium is presented.
Original languageEnglish
Article number14427831
Pages (from-to)651-657
Number of pages7
Journal IEEE Journal of Quantum Electronics
Issue number8
Publication statusPublished - 30 Jun 2014

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