Bowtie nanoantennas with symmetry breaking

Ji Chen; Zhaoyu Zhang

doi:10.1117/1.JNP.9.093798

22 December 2014 Bowtie nanoantennas with symmetry breaking

Ji Chen, Zhaoyu Zhang

Author Affiliations +

Journal of Nanophotonics, Vol. 9, Issue 1, 093798 (December 2014). https://doi.org/10.1117/1.JNP.9.093798

Abstract

Surface plasmon resonances of optical bowtie nanoantennas with symmetry breaking are studied numerically using the finite-element method. Beginning with both x-axial and y-axial symmetry, bowtie structures are reshaped by varying two parameters (edge lengths and bow angles) to create various symmetries to achieve controllable resonant modes and gap enhancement in the visible and infrared wavelength range. The four edges’ coupling is the main factor contributing to the final fundamental resonances. Double fundamental resonances can be achieved in bowtie structures with x-axial or y-axial symmetry. These properties can guide both the engineering and the fabrication of plasmonic nanoantennas.

Citation Download Citation

Ji Chen and Zhaoyu Zhang "Bowtie nanoantennas with symmetry breaking," Journal of Nanophotonics 9(1), 093798 (22 December 2014). https://doi.org/10.1117/1.JNP.9.093798

Published: 22 December 2014

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