Optically polarized selection in atomic vapor and its application in mapping the polarization distribution

Abstract

Based on the dichroism induced by the optical pumping effect, a novel and effective configuration to select an arbitrary polarization distribution is proposed. The influence of the distribution of atoms in different Zeeman sub-levels is the main cause to realize the measurement or 'filtration' of the state of polarization. A detailed process of the optical pumping effect in our configurations is presented in the theoretical analysis. In the experiment, the flexible function of the atomic medium, such as a polarizer or a polarized filter can efficiently be realized by different polarizations of the pump beam. Four different kinds of vector beams are tested and the ability to analyze any kind of beam with arbitrary polarization distribution is proven in agreement with the prediction. This work has potential applications in atomic physics and polarization optics. Furthermore, it can provide a reference to atom-optical elements and atom-optical devices. Figure 6. Theoretical definition (Top) and experimental results (Bottom) of polarization distribution. (Green: Left circular polarization; Blue: Right circular polarization; Black lines: linear polarization) (a) Radially polarized VB. (b) Hybridly polarized VB. (c) Second-order VB. (d) Hybridly second-order VB. 6 J. Phys. Commun. 4 (2020) 015019 J Wang et al

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