Polarized interaction of singular and Gaussian light beams in resonance media

D.V. Gorbach, S.A. Nazarov, O.G. Romanov, A.L. Tolstik

Belarusian Stete University, Belarus

Propagation and self-diffraction of singular and Gaussian light beams in the solution of Rhodamine 6G dye in terms of four– and six – wave mixing, as well as polarization recording dynamic holograms have been investigated. We have revealed that more complicated realization of effective overlapping of Gaussian and singular beams during recording singular dynamic holograms leads to higher sensitivity of multi-wave mixing to misalignment of optical paths of recording hologram waves. Diffracted wave is also a singular wave with an inverted topological charge in four-wave mixing. During six – wave mixing the sign of the topological charge of the diffracted wave changes inverts and doubles as compared to the signal wave. Our results allowed us to investigate the dependence of the efficiency of four-wave mixing with both Gaussian and singular signal waves on the angle between the polarization planes of waves recording a dynamic hologram. The dependences of the polarization state of the diffracted wave upon four-wave interactions between waves with both linear and circular polarization were obtained. It has been theoretically and experimentally investigated that the polarization multi-wave mixing gives the possibility to dynamically change the polarization of light waves. It is possible to rotate the plane of polarization by 90 °, as well as the translation of the linear polarization state in a circular.