Zeeman gyrotropic scatterers: Resonance splitting, anomalous scattering, and embedded eigenstates
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Date
2018-09
Authors
Gangaraj, S Ali Hassani
Monticone, Francesco
Valagiannopoulos, Constantinos
Journal Title
Journal ISSN
Volume Title
Publisher
Nanomaterials and Nanotechnology
Abstract
Anomalous scattering effects (invisibility, superscattering, Fano resonances, etc) enabled by complex media and metamaterials
have been the subject of intense efforts in the past couple of decades. In this article, we present a full analysis of
the unusual and extreme scattering properties of an important class of complex scatterers, namely, gyrotropic cylindrical
bodies, including both homogeneous and core–shell configurations. Our study unveils a number of interesting effects,
including Zeeman splitting of plasmonic scattering resonances, tunable gyrotropy-induced rotation of dipolar radiation
patterns as well as extreme Fano resonances and non-radiating eigenmodes (embedded eigenstates) of the gyrotropic
scatterer. We believe that these theoretical findings may enable new opportunities to control and tailor scattered fields
beyond what is achievable with isotropic reciprocal objects, being of large significance for different applications, from
tunable directive nano-antennas to selective chiral sensors and scattering switches, as well as in the context of nonreciprocal
and topological metamaterials
Description
Keywords
Scattering, gyrotropy, Zeeman effect, plasmonic resonances, embedded eigenstates
Citation
Constantinos Valagiannopoulos, S Ali Hassani Gangaraj, and Francesco Monticone. Zeeman gyrotropic scatterers: Resonance splitting, anomalous scattering, and embedded eigenstates. 2018. Nanomaterials and Nanotechnology