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Axial Toroidal Dipole Modes in All-Dielectric Trimer Metasurfaces

Kupriianov, Anton S.; Tuz, Vladimir R.; Khardikov, Vyacheslav V.; Han, Wei; Kivshar, Yuri


We demonstrate how to excite a resonant state resembling an axial toroidal dipole in metasurfaces made of particle clusters composed of three dielectric disks (trimers). The toroidal dipole response appears due to a symmetry breaking in the cluster geometry, via an energy release from an electromagnetic trapped (dark) mode. We consider several designs of metasurfaces where an asymmetry is introduced into the cluster by either employing disks of different radii or identical disks with holes. We...[Show more]

CollectionsANU Research Publications
Date published: 2018-09-13
Type: Conference paper
Source: Proceedings of the 17th International Conference on Mathematical Methods in Electromagnetic Theory (IEEE MMET 2018)
DOI: 10.1109/MMET.2018.8460255


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