Symmetry analysis of trimer-based all-dielectric metasurfaces with toroidal dipole modes
Victor Dmitriev,
Anton S. Kupriianov,
Silvio Domingos Silva Santos
et al.
Abstract:Herein, we discuss the conditions for excitation of symmetryprotected toroidal dipole modes in all-dielectric metasurfaces composed of trimer or twin-trimer clusters of dielectric disks. Such metasurfaces permit enhanced light-matter interaction due to spatially confined light in resonant systems with a high-quality factor. To describe characteristics of toroidal modes existing in the clusters, we use the magnetic dipole moments approximation, group-theoretical methods, group representation theory, symmetry-ad… Show more
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