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The key role of off-axis singularities in free-space vortex transmutation |
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| Authors: | David Novoa Iñigo J. Sola Miguel Angel García-March Albert Ferrando |
| Affiliation: | 1. Max Planck Institute for the Science of Light, Günther-Scharowsky Str. 1, 91058, Erlangen, Germany 2. Centro de Láseres Pulsados, CLPU, Edificio M3, Calle del Adaja, s/n, 37185, Villamayor, Spain 3. Grupo de Investigación en óptica Extrema (GIOE), Dpto. de Física Aplicada, Univ. de Salamanca, 37008, Salamanca, Spain 4. Dept. d’Estructura i Constituents de la Matèria, Univ. de Barcelona, 08028, Barcelona, Spain 5. Dept. d’òptica, Interdisciplinary Modeling Group, InterTech, Univ. de València, 46100, Burjassot, Valencia, Spain |
| Abstract: | We experimentally demonstrate the generation of off-axis phase singularities in a vortex transmutation process induced by the breaking of rotational symmetry. The process takes place in free space by launching a highly charged vortex, owning full rotational symmetry, into a linear thin diffractive element presenting discrete rotational symmetry. It is shown that off-axis phase singularities follow straight dark rays bifurcating from the symmetry axis. This phenomenon may provide new routes toward the spatial control of multiple phase singularities for applications in atom trapping and particle manipulation. |
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