Polarization controller based on embedded optical transformation

A universal 2D transformation formula for embedded transformation optics is suggested. Linear and nonlinear transformation results using the suggested formula under different conditions reveal several interesting phenomena and potential applications, and designs for various polarization controllers can be achieved based on this idea. For example, an incident Gaussian beam can be transformed into a typical spherical wave, and a cloak based on a polarization splitter is proposed for the first time. (C) 2009 Optical Society of America