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Title: Relation between 2D/3D chirality and the appearence of chiroptical effects in real nanostructures.
Author: Arteaga Barriel, Oriol
Sancho i Parramon, Jordi
Nichols, Shane
Maoz, Ben M.
Canillas i Biosca, Adolf
Bosch i Puig, Salvador
Markovich, Gil
Kahr, Bart
Keywords: Materials nanoestructurats
Nanostructured materials
Plasmons (Physics)
Issue Date: 27-Jan-2016
Publisher: Optical Society of America
Abstract: The optical activity of fabricated metallic nanostructures is investigated by complete polarimetry. While lattices decorated with nanoscale gammadia etched in thin metallic films have been described as two dimensional, planar nanostructures, they are better described as quasi-planar structures with some three dimensional character. We find that the optical activity of these structures arises not only from the dissymmetric backing by a substrate but, more importantly, from the selective rounding of the nanostructure edges. A true chiroptical response in the far-field is only allowed when the gammadia contain these non-planar features. This is demonstrated by polarimetric measurements in conjunction with electrodynamical simulations based on the discrete dipole approximation that consider non-ideal gammadia. It is also shown that subtle planar dissymmetries in gammadia are sufficient to generate asymmetric transmission of circular polarized light.
Note: Reproducció del document publicat a: 24.002242
It is part of: Optics Express, 2016, vol. 24, num. 3, p. 2242-2252
Related resource: 24.002242
ISSN: 1094-4087
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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