20 February 2012 A nanoplasmonic contour bowtie antenna for nanoscale confinement of mid-infrared radiation
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Abstract
An antenna geometry that represents the contour of a traditional bowtie antenna is proposed and investigated via finitedifference time-domain simulations. A parameter space consisting of the antenna length and the contour thickness is explored and design principles for this geometry are presented. It is demonstrated that a continuous red-shift of the resonant wavelength relative to the resonant wavelength of a bowtie antenna is possible by decreasing the contour thickness of the antenna. In the parameter space examined, it is found that the antenna footprint may be reduced by a factor of 3.6 and the gap enhancement factor may be increased by 28%. A conceptual understanding of the antenna behavior is built up by drawing a parallel between the plasmonic nanoshell and the nanoplasmonic contour bowtie antenna. Three other variations of this geometry are investigated in order to gain a deeper understanding of the underlying physics.
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S. Sederberg, S. Sederberg, A. Y. Elezzabi, A. Y. Elezzabi, } "A nanoplasmonic contour bowtie antenna for nanoscale confinement of mid-infrared radiation", Proc. SPIE 8260, Ultrafast Phenomena and Nanophotonics XVI, 82601X (20 February 2012); doi: 10.1117/12.909149; https://doi.org/10.1117/12.909149
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