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A Toroidal Metamaterial Switch
M. Gupta, , R. Singh
Published in Wiley-VCH Verlag
2018
PMID: 29210481
Volume: 30
   
Issue: 4
Abstract
Toroidal dipole is a localized electromagnetic excitation that plays an important role in determining the fundamental properties of matter due to its unique potential to excite nearly nonradiating charge–current configuration. Toroidal dipoles are recently discovered in metamaterial systems where it is shown that these dipoles manifest as poloidal currents on the surface of a torus and are distinctly different from the traditional electric and magnetic dipoles. Here, an active toroidal metamaterial switch is demonstrated in which the toroidal dipole can be dynamically switched to the fundamental electric dipole or magnetic dipole, through selective inclusion of active elements in a hybrid metamolecule design. Active switching of nonradiating toroidal configuration into highly radiating electric and magnetic dipoles can have significant impact in controlling the electromagnetic excitations in free space and matter that can have potential applications in designing efficient lasers, sensors, filters, and modulators. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei/1.
About the journal
JournalAdvanced Materials
PublisherWiley-VCH Verlag
ISSN09359648