The spin Hall effect near the tight focus of a vectorial Gaussian beam with higher-order cylindrical polarization

Abstract

In this study, we demonstrated that an even quantity of sub-wavelength domains is formed near the focal area of lens with big numerical aperture illuminated by cylindrical vector Gaussian beam (before and beyond the focus), in which the polarizing in every point revolves. Moreover, the polarization vector rotates in different directions inside the adjacent areas. Therefore, the spin angular momentum longitudinal component in these regions has opposite signs. Moreover, after the focal plane, the trend of the polarization rotation in all points of the light field distribution alters to the contrary one. Such dimensional division of the right-hand and left-hand turning of the polarization demonstrates the optical spin Hall effect.