Generation of nonuniformly polarised vortex Bessel beams by an interference polariser

A new optical system is proposed for the generation of azimuthally and radially polarised vortex Bessel beams. The system is based on the transformation of conical wavefronts passing through an interference polarisation plate. The polarisation characteristics during the beam formation are controlled by changing the curvature of the wavefront of the beam illuminating a diffractive axicon. Radially and azimuthally polarised vortex Bessel beams are experimentally obtained using a binary phase axicon.