title: Transformation of vector beams with radial and azimuthal polarizations in biaxial crystals.
abstract: We present both experimentally and theoretically the transformation of radially and azimuthally polarized vector beams when they propagate through a biaxial crystal and are transformed by the conical refraction phenomenon. We show that, at the focal plane, the transverse pattern is formed by a ring-like light structure with an azimuthal node, this node being found at diametrically opposite points of the ring for radial/azimuthal polarizations. We also prove that the state of polarization of the transformed beams is conical refraction-like, i.e., that every two diametrically opposite points of the light ring are linearly orthogonally polarized.
authors.forename: A
authors.initials: A
authors.lastname: Turpin
authors.forename: A
authors.initials: A
authors.lastname: Vargas
authors.forename: A
authors.initials: A
authors.lastname: Lizana
authors.forename: F A
authors.initials: FA
authors.lastname: Torres-Ruiz
authors.forename: I
authors.initials: I
authors.lastname: Estévez
authors.forename: I
authors.initials: I
authors.lastname: Moreno
authors.forename: J
authors.initials: J
authors.lastname: Campos
authors.forename: J
authors.initials: J
authors.lastname: Mompart