Beyond Toroidal Multipoles
Shi-Qiang Li, Kenneth B Crozier
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) | IEEE | Published : 2017
We propose to separate out the toroidal multipoles in the polar coordinates that is simpler than previous methods done in the Cartesian coordinates. We uncover higher order current configurations other than the toroidal electric multipole.