Sharp Toroidal Resonances in Planar Terahertz Metasurfaces.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 27417674.
- Also identified by DOI 10.1002/adma.201601611.
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Abstract
A toroidal dipole in metasurfaces provides an alternate approach for the excitation of high-Q resonances. In contrast to conventional multipoles, the toroidal dipole interaction strength depends on the time derivative of the surrounding electric field. A characteristic feature of toroidal dipoles is tightly confined loops of oscillating magnetic field that curl around the fictitious arrow of the toroidal dipole vector.