Fig. 2
From: Optical anapoles
Radiation patterns of the electric (p), magnetic (m) and toroidal (T) dipoles. Oscillating electric, magnetic, and toroidal dipoles have identical energy radiation patterns (emitted power per solid angle; red shells on the right). However, the electric and magnetic dipoles are distinguishable by the polarization state of the emitted light (TE – transverse electric; TM – transverse magnetic). Purple arrow lines on the surfaces of the shells show the direction of electric field oscillations. The electric and toroidal dipoles are indistinguishable by their far-field emission
