Science Daily  July 5, 2023 Researchers at the University of Pittsburgh showed that a circularly polarized electric dipole harbors a near-field concentrated wave which orbits around with an energy flux five orders of magnitude larger than far-field radiation. The near-field wave was found to carry transverse spins and reveal skyrmion spin texture. By performing electromagnetic analysis and numerical simulation, they demonstrated chiral extraction of a near-field rotational energy flux: the confined energy flow was out-coupled to surface plasmons on metal surface, whose curvature was designed to provide orbital angular momentum matched to spin angular momentum of dipole field, that is, […]