Laser-induced ESR shift from the contribution of the symmetric polarizability

This paper studies the contribution of the magnetically perturbed symmetric polarizability to the laser-induced shift in electron spin resonance (ESR) spectra. The calculated ESR shift for a sodium atom as an example shows that in a circularly polarized laser beam at a frequency near the optical absorption the ESR shift due to the contribution of the symmetric polarizability becomes one order of magnitude larger than that of the antisymmetric part. In a linearly polarized optical field only the symmetric part contributes to the laser-induced ESR shift. The shift of a sodium atom near optical absorption will be of the order of 1–10 MHz.