Detection of Spiral photons in Quantum Optics

Details Detection of Spiral photons in Quantum Optics Detection of Spiral photons in Quantum Optics

2008-02-05

arxiv.org/abs/0802.0560v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

We show that a new type of photon detector, sensitive to the gradients of electromagnetic fields, should be a useful tool to characterize the quantum properties of spatially-dependent optical fields. As a simple detector of such a kind, we propose using magnetic dipole or electric quadrupole transitions in atoms or molecules and apply it to the detection of spiral photons in Laguerre-Gauss (LG) beams. We show that LG 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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