Since (at least) a quarter of a century researchers are fascinated by light that carries orbital angular momentum. At Glasgow we routinely use a variety of techniques to imprint structure in the spatial amplitude, phase and polarization of a light beam, aiming to study the interaction with atomic vapours. In this presentation however, I will concentrate on the light fields themselves, and in particular on the strong correlations between the polarisation and spatial degree of freedom. We quantify these correlations via concurrence measurements, investigate their use for enhanced focussing, and employ them in a single-shot broad band polarimeter.
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