Detecting of photons in optical fields of complicated spatial structure

Details Detecting of photons in optical fields of complicated spatial structure Detecting of photons in optical fields of complicated spatial structure

2008-05-12

arxiv.org/abs/0805.1697v1

Physics

Quantum Physics

34 pages,14 figures

Scientific paper

We show that a photon detector, sensitive to the gradients of electromagnetic fields, or to magnetic fields, should be a useful tool to characterize the quantum properties of spatially-dependent optical fields. We discuss the excitation of an atom on a magnetic dipole or electric quadrupole transitions with the spiral photons of a Laguerre-Gauss (LG) or Bessel beams. We show that these beams are not true hollow beams, due to the presence of magnetic fields and gradients of electric fields on beam axis. This approach paves the way to an analysis at the quantum level of the spatial structure and angular momentum properties of singular light beams.

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