Abstract
Various efforts have been made to determine the polarization state of evanescent waves in different structures. The present study shows the reliability of magneto-optical spectroscopy of D1 and D2 lines of rubidium metal and polarization-dependent transitions to investigate and trace the changes in the polarization state of evanescent fields during total internal reflection over different angles. For this purpose, we design and fabricate atomic- evanescent Rb vapor cells and examine the effect of polarization changes of evanescent waves, depending on the propagation direction of evanescent waves in anisotropic rubidium vapor media under 88 mT external magnetic field by different configurations theoretically and experimentally. The results confirm the dependency of allowed sigma^{ pm } { };{text{and}};pi transitions on the magneto optical configuration as a tool to determine changes in the polarization of evanescent waves in more complicated wave states in anisotropic media.
Highlights
Various efforts have been made to determine the polarization state of evanescent waves in different structures
Our results show that atomic spectroscopy of rubidium vapor under an applied magnetic field has enough sensitivity to small changes in the polarization state of evanescent waves if a suitable configuration is chosen
We showed that simulation of the absorption spectra of the polarization state set to normal modes of an anisotropic atomic medium is a good standing point for comparison of experimental and simulation data with the purpose of sensitivity to any probable change in the polarization state of evanescent waves
Summary
Various efforts have been made to determine the polarization state of evanescent waves in different structures. They showed interaction of evanescent wave with atoms is sensitive to external magnetic field and applied different configurations of light and magnetic field to observe the contributions of π and σ Zeeman split lines on absorption spectra.
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