期刊
SUPERLATTICES AND MICROSTRUCTURES
卷 49, 期 3, 页码 288-293出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2010.07.003
关键词
Metal nanoparticles; Light scattering; Stochastic optimization
In this work we make use of a bio-inspired stochastic technique to find the optimal geometry that maximizes, for a fixed wavelength, the scattering cross section of a bidimensional metal nanostar. To solve the scattering problem, we employ a rigorous numerical method based on Green's theorem using surface integral equations. It is shown that the optimization procedure converges to a nanostar geometry that exhibits a resonance at or near the given wavelength. The influence of the illumination conditions, the effect of geometries found on the near-field features, and the possibilities and limitations of our approach are discussed through some numerical experiments. (C) 2010 Elsevier Ltd. All rights reserved.
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