Excitation of nonradiating magnetic anapole states with azimuthally polarized vector beams

• Aristeidis G. Lamprianidis and
• Andrey E. Miroshnichenko

Beilstein J. Nanotechnol. 2018, 9, 1478–1490, doi:10.3762/bjnano.9.139

• illuminated by such beams. We propose several configuration schemes where magnetic anapole modes of simple or hybrid nature can be detected in silicon nanospheres, nanodisks and nanopillars. Keywords: anapole excitation; dielectric nano-optics; multipolar expansion; T-matrix method; vector beams

• 1st kind, with being the generalized Legendre functions. is a normalization factor for the Legendre functions and plays an important role for the numerical calculation of the elements of the T-matrix that will follow later. are the correspondent spherical amplitudes of the multipolar expansion of

• Information File 1) that the spherical amplitudes of the multipolar expansion of each component of the plane wave spectrum of the incident field, denoted as , are given by the formula below: where and δαβ is the Kronecker delta, which yields 1 for α = β, or 0 for α ≠ β. By integrating the flux of the