Design and Optimization of Two-Dimensional Nano-Arrays for Directive Radiation
We consider design, optimization, and computational analysis of nano-arrays involving two-dimensional arrangements of nanoparticles. Similar to their counterparts used at the lower frequencies, nanoantennas can be arranged periodically to achieve directive and/or controllable radiation patterns at optical frequencies. While nanoantenna geometries are usually simple due to restrictions in nanoscale fabrications, their robust analysis still requires accurate simulation tools to model strong plasmonic interactions between particles. We use a full-wave optimization environment based on heuristic algorithms and surface integral equations to optimize two-dimensional nano-arrays and to shape their radiation patterns for diverse nano-optical applications.
D. P. Fromm, et al., “Gap-dependent optical coupling of single bowtie nanoantennas resonant in the visible,” Nano Lett., vol. 4, no. 5, pp. 957– 961, Mar. 2004.
P. J. Schuck, et al., “Improving the mismatch between light and nanoscale objects with gold bowtie nanoantennas,” Phys. Rev. Lett., vol. 94, no. 017402, Jan. 2005.
D. M. Solis, et al., “Optimization of an optical wireless nanolink using directive nanoantennas,” Opt. Exp., vol. 21, no. 2, pp. 2369–2377, 2013.
H. Chen, et al., “Design, fabrication, and characterization of near-IR gold bowtie nanoantenna arrays,” Phys. Chem. C, vol. 118, no. 35, pp. 20553– 20558, Aug. 2014.
M. Alavirad, L. Roy, and P. Berini, “Optimization of plasmonic nanodipole antenna arrays for sensing applications,” IEEE J. Sel. Top. Quantum Electron., vol. 20, no. 3, May/June 2014.
A. Altınoklu and O. Erg ¨ ul, “Computational analysis and full-wave ¨ optimizations of nanoantenna arrays for desired scattering and radiation characteristics,” in Proc. URSI General Assembly and Scientific Symp. (URSI-GASS), 2017.
A. C¸ ekinmez, B. Karaosmanoglu, and ˘ O. Erg ¨ ul, “Integral-equation ¨ formulations of plasmonic problems in the visible spectrum and beyond,” in Dynamical Systems - Analytical and Computational Techniques, M. Reyhanoglu, Ed. InTech, 2017, pp. 191–214.