Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams

We analyze the photo-excitation of atoms with a single valence electron by cylindrically polarized Laguerre-Gaussian beams. Theoretical analysis is performed within framework first-order perturbation theory and expanding vector potential beam in terms its multipole components. For beams, we show that (magnetic) sub-components electric-quadrupole field vary significantly cross-section waist radial distance from axis. discuss influence varying magnetic component on sub-level population localized atomic target. In addition, calculate total excitation rate electric quadrupole transition ($4s \;^{2}S_{1/2} \rightarrow 3d \;^{2}D_{5/2}$) mesoscopic target Ca$^{+}$ ion. These calculations shows sensitive to between center However, found more efficient driving than circularly