All-dielectric reciprocal bianisotropic nanoparticles
Date
2015
Authors
Alaee, Rasoul
Albooyeh, M
Rahimzadegan, Aso
Mirmoosa, Mohammad S.
Rockstuhl, Carsten
Kivshar, Yuri
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
The study of high-index dielectric nanoparticles currently attracts a lot of attention. They do not suffer from
absorption but promise to provide control of the properties of light comparable to plasmonic nanoparticles.
To further advance the field, it is important to identify versatile dielectric nanoparticles with unconventional
properties. Here, we show that breaking the symmetry of an all-dielectric nanoparticle leads to a geometrically
tunable magnetoelectric coupling, i.e., an omega-type bianisotropy. The suggested nanoparticle exhibits different
backscatterings and, as an interesting consequence, different optical scattering forces for opposite illumination
directions. An array of such nanoparticles provides different reflection phases when illuminated from opposite
directions. With a proper geometrical tuning, this bianisotropic nanoparticle is capable of providing a 2π phase
change in the reflection spectrum while possessing a rather large and constant amplitude. This allows the creation
ofreflectarrayswithnear-perfecttransmissionoutoftheresonancebandduetotheabsenceofausuallyemployed
metallic screen.
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Physical Review B: Condensed Matter and Materials
Type
Journal article
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Open Access
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