Asymmetric optical beam manipulation via polarization and spatial phase-dependency |
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Authors: | C Ceroici AY Elezzabi |
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Institution: | 1. Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany;2. Institute of Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwashi, Chiba 277-8581, Japan;1. Via Molinetto 35, 26845 Triulza di Codogno (LO), Italy;2. Via Zoncada 51, 26845 Codogno (LO), Italy;3. Via Don G. Minzoni 26/D, 20020 Magnago (MI), Italy |
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Abstract: | We report on an optical beam produced by superimposing radially- and circularly-polarized laser beams for active control of the location of the beam's intensity. The asymmetric intensity distribution relative to the beam's central axis, and its location is determined by the relative phase difference between the two beams. Since the beam has a planar wavefront, it carries no orbital angular momentum, yet it shares phase singularity and spiral interference characteristics commonly associated with helical wavefronts. Such an optical beam is valuable for applications in optical–optical switches and routers, optical steering, and also optical trapping and rotation, or driving opto-micromachines. |
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