Seminarium Optyczne

In the talk I would like to present realization of four wave mixing process in various environments. In 1999 we predicted and observed for the first time four wave mixing in Bose Einstein condensate medium, with cold atoms rather than photons. Soon after the whole field of matter wave optics emerged. Since then we realized that this phenomenon can occur in many various situations: in spinor condensates, in the presence of linear and nonlinear lattice, in optical systems with gain and losses and many others. I will review some of different scenarios and discuss phase matching conditions in “exotic” circumstances, focusing on the latest study of four wave mixing in pt symmetric coupler.