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Dark‐field illumination is shown to make planar chiral nanoparticle arrangements exhibit circular dichroism in extinction, analogous to true chiral scatterers. Single oligomers, consisting rotationally symmetric arrangements of gold nanorods, are experimentally observed to exhibit circular dichrosim at their maximum scattering with strong agreement to numerical simulation. A dipole model is developed...
Waveguide-integrated plasmonic crystals are fabricated and characterized using a hybrid platform where silver nanogap tilings are embedded in a layer of SiO2 on the surface of a SOI chip. Preliminary results of the second Bragg transmission spectra and asymmetric forward and backward transmission effect are presented.
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