SAMOP 2023 – scientific programme
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A: Fachverband Atomphysik
A 12: Poster I
A 12.21: Poster
Tuesday, March 7, 2023, 16:30–19:00, Empore Lichthof
A study of the Hanle effect with twisted light — •Riaan Philipp Schmidt — Physikalisch-Technische Bundesanstalt, D-38116 Braunschweig, Germany — Institute of Mathematical Physics, Technical University Braunschweig, D-38106 Braunschweig, Germany
We analyze the depolarization of resonance fluorescence from atoms exposed to twisted (Bessel) radiation. Special attention has been paid to the dependence on the external magnetic field strength, known as the Hanle effect, which is investigated within the framework of the density-matrix theory based on the Liouville-von Neumann equation. While the derived expressions can be employed to study the Hanle effect for any atomic system, detailed calculations of the P1 and P3 Stokes parameters of the emitted radiation have been performed for the 6s2 1S0 − 6s6p 3P1 transition in mercury. Our results indicate how the fluorescence depolarization may be affected by the spatial structure and polarization of the incident light field, as well as by the applied magnetic field. This study contributes to a better understanding of the potential of twisted light in atomic spectroscopy.