Abstract content <br> (Max 300 words)
We show how to generate non-diffracting vector Bessel beams by implementing a spatial light modulator (SLM) and a q-plate, which is an azimuthally-varying birefringent plate. The SLM first creates the scalar Bessel beams which are then converted into vector Bessel beams by the use of the q-plate. We demonstrate how the orbital angular momentum (OAM) of these generated beams can be measured by performing a modal decomposition on each of the beam’s polarization components. This is achieved by separating the polarization components through a circular polarization beam-splitter before performing the modal decomposition. We study both single charged Bessel beams as well as superpositions and the results are in good agreement with theory.
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Main supervisor (name and email)<br>and his / her institution
Prof. Andrew Forbes, AForbes1@csir.co.za, CSIR National Laser Centre