2019/05/08 by J. Enrique Vázquez‐Lozano, J. Enrique Vázquez-Lozano, Alejandro Martínez +3
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Atomic physics #Dipole #Discrete dipole approximation #Electric field #Electromagnetic Compatibility and Measurements #Field (mathematics) #Magnetic dipole #Mathematics #Metamaterials and Metasurfaces Applications #Multipole expansion #Order (exchange) #Physics #Quadrupole #Quadrupole magnet #Quantum electrodynamics #Quantum mechanics #Spectral line #physics.optics
paper · pdf · doi:10.1103/physrevapplied.12.024065
published as Phys. Rev. Applied 12, 024065 (2019) · 7 pages, 2 figures. Supplemental Material (19 pages). Supplemental tools (calculator of angular spectra and animation) available at https://doi.org/10.5281/zenodo.2677908
arxiv created 2019/05/08 · openalex publication_date 2019/08/30 · arxiv updated 2019/09/04 · openalex created_date 2019/09/05 · openalex updated_date 2026/08/05
A paramount example among spin-related optical phenomena is the quantum spin Hall effect of light, by which the direction of propagating guided modes can be controlled by the spin of the source. For unidirectional excitation of guided waves, the focus has been only on dipolar sources, leaving aside higher-order multipoles. Exploiting the angular-spectrum representation, the authors present a general analytical treatment of near-field directionality beyond the dipole approximation. This enables a considerable advance toward full control of spin-dependent directionality at the nanoscale, and should be useful for engineering light-matter coupling in nanophotonics and quantum optics.