title: Isotropically polarized speckle patterns.
abstract: The polarization of the light scattered by an optically dense and random solution of dielectric nanoparticles shows peculiar properties when the scatterers exhibit strong electric and magnetic polarizabilities. While the distribution of the scattering intensity in these systems shows the typical irregular speckle patterns, the helicity of the incident light can be fully conserved when the electric and magnetic polarizabilities of the scatterers are equal. We show that the multiple scattering of helical beams by a random dispersion of "dual" dipolar nanospheres leads to a speckle pattern exhibiting a perfect isotropic constant polarization, a situation that could be useful in coherent control of light as well as in lasing in random media.
authors.affiliation: Materials Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain.|Donostia International Physics Center DIPC, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain.
authors.forename: Mikolaj K
authors.initials: MK
authors.lastname: Schmidt
authors.affiliation: Materials Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain.|Donostia International Physics Center DIPC, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Aizpurua
authors.affiliation: Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia.|ARC Center for Engineered Quantum Systems, Macquarie University, North Ryde, New South Wales 2109, Australia.
authors.forename: Xavier
authors.initials: X
authors.lastname: Zambrana-Puyalto
authors.affiliation: Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia.
authors.forename: Xavier
authors.initials: X
authors.lastname: Vidal
authors.affiliation: Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia.|ARC Center for Engineered Quantum Systems, Macquarie University, North Ryde, New South Wales 2109, Australia.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Molina-Terriza
authors.affiliation: Donostia International Physics Center DIPC, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain.|Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Sáenz