Calculated electric field distributions of two transverse electric modes (top and bottom) from three rectangular dielectric nanostrips with three different interstrip spacings (10, 31, and 80 mm). The red color indicates the highest field values, and blue the lowest.
From the article:
Improving Optical Confinement in Nanostructures via External Mode CouplingQ. H. Song and H. Cao
Phys. Rev. Lett. 105, 053902 (2010)
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