Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 6: Atomic Systems in External Fields I
A 6.6: Vortrag
Montag, 11. März 2024, 18:15–18:30, HS 1098
Structured-light-matter interaction in external fields — •Riaan Philipp Schmidt1, Shreyas Ramakrishna2, Anton Peshkov1, Sonja Franke-Arnold3, and Andrey Surzhykov1 — 1Physikalisch-Technische Bundesanstalt — 2Helmholtz-Institut Jena — 3School of Physics and Astronomy, University of Glasgow
During recent years, a number of studies has been performed to investigate the interaction of atomic media with structured light modes. These studies paved the way for the application of structured beams in optical traps and tweezers, classical and quantum communication, and atomic magnetometers. In particular, the latter are based on the analysis of absorption images of such beams in an atomic cloud [1]. In this contribution, we perform a theoretical study for the coupling of atoms and structured light in external fields. In the framework of the density matrix approach and the Liouville-von Neumann equation, we show that experimental observables, i.e. intensity of the transmitted light, are very sensitive to the incident radiation and the external fields. To illustrate this sensitivity we performed detailed calculations for the 5s 2S1/2 − 5p 2P3/2 transition in a rubidium atom induced by various structured light modes. Based on the results of these calculations, we find that the transmission patterns allow for the detection of the alignment of an external magnetic field and the analysis of frequency detuning of the radiation from the atomic resonance. This opens up new opportunities for structured light in atomic magnetometers and polarization spectroscopy experiments.
[1] F. Castellucci et al., Phys. Rev. Lett. 127, 233202 (2021)
Keywords: Light-matter interaction; Angular momentum of light; Atomic processes in external fields