Directional scattering by composite SiO2/Au nanoparticles
T. P.S. Kotte (TU Delft - ImPhys/Adam group)
A. J.L. Adam (TU Delft - ImPhys/Adam group)
H. P. Urbach (TU Delft - ImPhys/Adam group, TU Delft - ImPhys/Urbach group)
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Abstract
We show that composite nanoparticles can be designed to scatter light into a desired direction. By choosing the materials of the nanoparticle carefully, the phase of the scattered light by the different components can be controlled. This leads to constructive interference is certain directions and destructive interference in others, resulting in directional scattering obtainable for a large bandwidth. FEM simulations were used to validate the theory. Furthermore, SiO2/Au nanoparticles were fabricated and measured confirming the directional scattering.