Hannover 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 3: Atomic systems in external fields I

A 3.7: Vortrag

Montag, 29. Februar 2016, 12:45–13:00, f303

Absorption of Laguerre-Gaussian light beam by hydrogen atoms — •Anton Peshkov¹, Andrey Surzhykov¹, and Stephan Fritzsche^1,2 — ¹Helmholtz-Institut Jena, Germany — ²Theoretisch-Physikalisches Institut, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Germany

The family of twisted (or vortex) light beams was actively explored in experiment and theory during the last three decades. These beams possess a well-defined projection of the angular momentum onto their propagation direction. Special attention was paid to the paraxial Laguerre-Gaussian (LG) and nonparaxial Bessel beams. An interaction of atoms with such types of light beams, for instance a photoabsorption process, is thought to be of interest. There was the recent study [1] which have concerned an absorption of Bessel beam by hydrogen atoms. In this contribution we discuss the absorption of LG beam by the hydrogen atoms. The analysis is performed within nonrelativistic first-order perturbation theory. It is shown that the well-known selection rules for atomic magnetic quantum numbers are not valid anymore when atoms absorb a high-order LG mode. In addition, we compare a population of atomic magnetic substates for the transition 1s → 2p with results for an incident Bessel beam obtained in the previous work [1].

[1] H. M. Scholz-Marggraf, S. Fritzsche, V. G. Serbo, A. Afanasev, and A. Surzhykov, Phys. Rev. A 90, 013425 (2014).