Year-end Sale % OFF 
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.
Highlights
Several of the conventional symmetries of scattering systems are broken when certain materials are biased by a static magnetic field
In a biased plasma, magneto-optic effects are due to the interaction of a harmonic electric field with free electrons in circular motion due to the applied static magnetic bias, which alters
Our goal is to elucidate the different resonant effects that arise when a nonzero bias is applied to the scatterer, with particular focus on the spectral splitting of resonances (Zeeman effect),[12,13] the ability to modify and rotate the dipolar scattering pattern, and the connection of these results with recent investigations on Fano resonances[14] and embedded eigenstates.[15,16,17,18]
Summary
The emerging area of topological electromagnetics and photonics is stimulating renewed interest in natural and artificial gyrotropic (meta)materials to achieve anomalous propagation effects,[1,2] including unidirectional, defectimmune, wave-guiding structures, and robust radiating systems.[3,4,5,6] Relatively less attention has instead been devoted to gyrotropic scattering systems and their unusual scattering effects.[7,8] several of the conventional symmetries of scattering systems (time-reversal symmetry, angular symmetries of the radiation pattern, etc) are broken when certain materials are biased by a static magnetic field (or other quantities, e.g. angular momentum,[9,10] that mimic the effect of a magnetic bias).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
