2024-03-28T15:54:33Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1769512020-12-13T09:07:43Zcom_10261_115com_10261_3col_10261_368
Optical polarization Möbius strips on all-dielectric optical scatterers
García-Etxarri, Aitzol
Diputación Foral de Guipúzcoa
European Commission
Singular optics
High refractive index nanoparticles
Kerker conditions
Polarization singularities
In this article, we study the emergence of polarization singularities in the scattering of optical resonators excited by linearly polarized light. First, we prove analytically that spherical all-dielectric nanoparticles described by combinations of electric and magnetic isotropic polarizabilities can sustain L surfaces and C lines that propagate from the near-field to the far field. Based on these analytical results, we are able to derive anomalous scattering Kerker conditions using singular optics arguments. Next, through full-field calculations, we demonstrate that high refractive index spherical resonators present such topologically protected features. We calculate the polarization structure of light around the generated C lines, unveiling a Möbius strip structure in the main axis of the polarization ellipse when calculated on a closed path around the C line. These results prove that high-index nanoparticles are excellent candidates for the generation of polarization singularities and that they may lead to new platforms for the experimental study of the topology of light fields around optical antennas.
A.G.-E. received funding from the Fellows Gipuzkoa fellowship of the Gipuzkoako Foru Aldundia through FEDER “Una Manera de hacer Europa”.
Peer Reviewed
2019-02-28T13:02:58Z
2019-02-28T13:02:58Z
2017
2019-02-28T13:02:58Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1021/acsphotonics.7b00002
e-issn: 2330-4022
ACS Photonics 4(5): 1159-1164 (2017)
http://hdl.handle.net/10261/176951
10.1021/acsphotonics.7b00002
http://dx.doi.org/10.13039/501100000780
Sí
none
American Chemical Society