Optimization of Large-Scale Vogel Spiral Arrays of Plasmonic Nanoparticles
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In this paper, we combine coupled dipole approximation (CDA) theory with optimization codes based on cyclic coordinate descent minimization to obtain the best configurations of plasmonic nanoparticles that produce maximal scattering or absorption efficiencies in large-scale Vogel spiral arrays. The optimization is performed from the ultraviolet to the visible spectral range for different and commonly used plasmonic materials, namely gold, silver, and aluminum. General engineering trends for optimized Vogel structures with varying numbers of particles are obtained for each material. The optimization strategy demonstrated in this work enables rapid prototyping of large-scale photonic-plasmonic coupled devices composed of a large number of small resonant nanoparticles, and can be utilized for the optimal design of plasmon-enhanced optical sensors, photodetectors, solar cells, and enhanced-efficiency light sources, and nonlinear optical components.
KeywordsPlasmonics Optimization Multiple scattering Metamaterials
This research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-12-2-0023. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein.
This research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-12-2-0023.
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