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Article overview
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All-dielectric bianisotropic nanoantennas | | Rasoul Alaee
; Mohammad Albooyeh
; Aso Rahimzadegan
; Mohammad S. Mirmoosa
; Yuri S. Kivshar
; Carsten Rockstuhl
; | | Date: |
27 Aug 2015 | | Abstract: | The study of high-index dielectric nanoparticles and nanoantennas currently
attracts a lot of attention. They do not suffer from absorption but promise to
provide control on the properties of light comparable to plasmonic
nanoantennas. To further advance the field, it is important to identify
versatile dielectric nanoantennas with unconventional properties. Here, we show
that breaking the symmetry of an all-dielectric nanoantenna leads to a
geometrically tunable magneto-electric coupling, i.e. a strong bianisotropy.
The suggested nanoantenna exhibits different backscatterings and, as an
interesting consequence, different optical scattering forces for opposite
illumination directions. An array of such nanoantennas provides different
reflection phases when illuminated from opposite directions. With a proper
geometrical tuning, this bianisotropic nanoantenna is capable of providing a
$2pi$ phase change in the reflection spectrum while possessing a rather large
and constant amplitude. This allows creating reflectarrays with near-perfect
transmission out of the resonance band due to the absence of an usually
employed metallic screen. | | Source: | arXiv, 1508.6965 | | Services: | Forum | Review | PDF | Favorites | |
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