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. 2017 Apr 10;3:16086. doi: 10.1038/micronano.2016.86

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Copyright © 2017 The Author(s)

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Dependence of the spectral response on the NP dimer orientation. (a) Geometric details of the simulations. The dimer comprises a pair of gold monomers, each of which had a diameter of 60 nm and was separated from each other by 10 nm. The long axis of the dimer was aligned with the x axis, and the light was incident with an oblique angle of θ=−30°; θ and φ are the polar and azimuthal angles in the text. (b) Calculated extinction cross-section at 530 nm for p-polarized light. (c) Calculated extinction cross-section at 530 nm for s-polarized light. (d) Normalized difference in polarization-averaged cross-section Δσ_norm between λ=530 and 585 nm as a function of θ and φ. NP, nanoparticle.