Calculated distributions, in the meridional y-z plane, of |E |2 (where E is the electric field) inside and near a single polystyrene sphere (microlens) located in free space (air, left top) and at a glass substrate (left bottom) are compared here to the corresponding distributions of |E |2 for these microlenses placed each inside a planar closely-packed (hexagonal) array of identical spheres (right). The microlens outline is shown with a white circle. The glass substrate is shown with the vertical line. The distributions are normalized by the field of the incident plane light wave that propagates along the z direction. Refractive indices of each sphere and the substrate are 1.59 and 1.46, respectively. The diameter, d, of each sphere is 1000 nm, and the wavelength of light is 800 nm. The figure reproduced by permission from Pikulin A et al 2012 with minor modifications. [AP]. See the entire VBA.
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