Circular Polarization near the Tight Focus of Linearly Polarized Light

We have considered the tight focusing of light with linear polarization. Using Richards–Wolf formalism, it is shown that before and after focal plane, there are regions in which polarization circular (elliptical). When passing through direction rotation vector reversed. If focus a certain area was left polarization, then directly this will be similar right This effect allows linearly polarized to used rotate dielectric microparticles little absorption around their center mass.