We present a convenient method to generate vector beams of light having polarization singularities on their axis, via partial spin-toorbital angular momentum conversion in a suitably patterned liquid crystal cell. The resulting polarization patterns exhibit a C-point on the beam axis and an L-line loop around it, and may have different geometrical structures such as “lemon”, “star”, and “spiral”. Our generation method allows us to control the radius of L-line loop around the central C-point. Moreover, we investigate the free-air propagation of these fields across a Rayleigh range.

Generation and dynamics of optical beams with polarization singularities

CARDANO, FILIPPO;MARRUCCI, LORENZO;DE LISIO, CORRADO;SANTAMATO, ENRICO
2013

Abstract

We present a convenient method to generate vector beams of light having polarization singularities on their axis, via partial spin-toorbital angular momentum conversion in a suitably patterned liquid crystal cell. The resulting polarization patterns exhibit a C-point on the beam axis and an L-line loop around it, and may have different geometrical structures such as “lemon”, “star”, and “spiral”. Our generation method allows us to control the radius of L-line loop around the central C-point. Moreover, we investigate the free-air propagation of these fields across a Rayleigh range.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/542724
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