We put forward schemes to prepare photons in multidimensional vector states of orbital angular momentum. We show realizable light distributions that yield prescribed states with finite or infinite normal modes. In particular, we show that suitable light vortex pancakes allow the add-drop of specific vector projections. We suggest that such photons might allow the generation of engineered quNits in multidimensional quantum information systems.
Molina, G., Juan P. Torres, Torner, L. Management of the angular momentum of light: preparation of photons in multidimensional vector states of angular momentum. "Physical review letters", Gener 2002, vol. 88, núm. 1, p. 13601-13604.