Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 8: Atomic systems in external fields
A 8.2: Poster
Dienstag, 15. März 2022, 16:30–18:30, P
Interaction of atoms with cylindrically polarized Laguerre-Gaussian beams — •Shreyas Ramakrishna1,2,3, Jiri Hofbrucker1,2, and Stephan Fritzsche1,2,3 — 1Helmholtz Institute Jena, Frobelstieg 3, D-07749 Jena, Germany — 2GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Planckstrasse 1, D-64291, Germany — 3Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universitat Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
The excitation of atoms with a single valence electron by cylindrically polarized Laguerre-Gaussian beams is analyzed within the framework of first-order perturbation theory. For cylindrically polarized Laguerre-Gaussian beams, we show that the magnetic components of the electric-quadrupole field varies significantly in the beam cross-section with beam waist and radial distance from the beam axis. Furthermore, we discuss the influence of varying magnetic components of the electric-quadrupole field in the beam cross-section on the sub-level population of a localized atomic target. In addition, we calculate the total excitation rate of electric quadrupole transition (4s 2S1/2 - 3d 2D5/2) in a mesoscopic target of Ca+ ion. Our calculation shows that the cylindrically polarized Laguerre-Gaussian beams are more efficient in driving electric quadrupole transition in the mesoscopic atomic target than circularly polarized beams.