96254 20201119151139.0 doi 10.1364/OL.44.003578 sideral 113142 ART-2019-113142 eng (orcid)0000-0003-1740-2244 Gil, J.J. Universidad de Zaragoza Intensity and spin anisotropy of three-dimensional polarization states 2019 Access copy available to the general public Unrestricted Anisotropy is a natural feature of polarization states, and only fully random three-dimensional (3D) states exhibit complete isotropy. In general, differences between the strengths of the electric field components along the three orthogonal directions give rise to intensity anisotropy. Moreover, polarization states involve an average spin whose inherent vectorial nature constitutes a source of spin anisotropy. In this work, appropriate descriptors are identified to characterize quantitatively the levels of intensity anisotropy and spin anisotropy of a general 3D polarization state, leading to a novel interpretation for the degree of polarimetric purity as a measure describing the overall polarimetric anisotropy of a 3D optical field. The mathematical representation, as well as the physical features of completely intensity-isotropic 3D polarization states with a maximum spin anisotropy, are also examined. The results provide new insights into the polarimetric field structure of random 3D electromagnetic light states. (C) 2019 Optical Society of America info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.714 2019 OPTICS 18 / 97 = 0.186 2019 Q1 T1 1.788 2019 Atomic and Molecular Physics, and Optics 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Norrman, A. Friberg, A.T. Setala, T. 2002 385 Universidad de Zaragoza Dpto. Física Aplicada Área Física Aplicada 44, 14 (2019), 3578-3581 Opt. lett. Optics Letters 0146-9592 1224560 http://zaguan.unizar.es/record/96254/files/texto_completo.pdf Versión publicada 26955 http://zaguan.unizar.es/record/96254/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:96254 articulos driver 2020-11-19-12:43:14 ARTICLE