Photons and vortices

Representations of a single photon are critically reviewed, and it is found that none of the existing theories describes it completely. It is argued t hat a concrete physical model of a photon is necessary to resolve the conce ptual problems. A review on the physics of singular light beams brings out the significance of the angular momentum at a fundamental level. It is sugg ested that this may be useful to develop a photon fluid approach to the ele ctromagnetic fields.