Figure 1
(a) Representative toroidal source and an all-dielectric source supporting anapole excitation. Its metamolecule is composed of four closely spaced infinitely long high-index dielectric cylinders. Yellow arrows show displacement currents j induced by the vertically polarized electric dipole antenna (P), red arrows show magnetic moments M of the constituent dielectric cylinders, and the green arrow represents the electric field E, toroidal and electric moments. (b) The calculated spectrum S21 of power received at second antenna relative to the power input to the anapole source composed of four cylinders, as shown in Fig. 1a. The results correspond to the HFSS simulations. (c) Contributions of the five strongest multipole excitations to the radiation of the anapole source.
