Biomedical subjects

Chaim Schwartz

Publications and source records attributed to Chaim Schwartz.

4 recordsLinked to original sources

PubMed2006

Backscattered polarization patterns, optical vortices, and the angular momentum of light.

We demonstrate that the polarization patterns observed in backscattering of linearly polarized light are a manifestation of the conservation of angular momentum of light. We will show that this phenomenon can be described in terms of phase vortices that are acquired by the right and left circularly polarized components. The helicity and orbital angular momentum of these components satisfy the requirement for conservation of angular momentum.

Journal Article↗

PubMed2006

Mode coupling approach to beam propagation in atmospheric turbulence.

A mode coupling approach based on the modal theory of coherence is suggested for the study of partially coherent beams in atmospheric turbulence. An approximate expression is derived for the mode power coupling coefficients, and some specific cases are studied using numerical methods. Several general results derived from the properties of the coupling coefficients are also presented.

Journal Article↗

PubMed2006

Inverse source problem for partially polarized beams in turbulent media.

The propagation of a class of partially polarized beams though atmospheric turbulence is treated using the coherent-modes-decomposition approach. This approach allows specifying the properties of sources generating radiation with a narrow polarization distribution that could be employed in active polarimetric remote sensing applications.

Journal Article↗

PubMed2005

Enhanced backscattering of optical vortex fields.

The effect of an incident field with a phase screw dislocation (a so-called optical vortex) on the shape of the enhanced backscattering cone was studied theoretically and demonstrated experimentally. We show that the correlation function of the incident field acts as a filter that modifies the shape of the enhanced backscattering cone. The peak value is reduced, and its width is increased as the topological charge of the phase dislocation increases.

Journal Article↗