Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 1: Atomic Systems in External Fields I
A 1.1: Hauptvortrag
Montag, 10. März 2025, 11:00–11:30, KlHS Mathe
Spatially dependent polarization spectroscopy with structured light modes — •Riaan Philipp Schmidt1,2, Richard Aguiar Maduro3, Anton Peshkov1,2, Sonja Franke-Arnold3, and Andrey Surzhykov1,2,4 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Institut für Mathematische Physik, Technische Universität Braunschweig, Germany — 3School of Physics and Astronomy, University of Glasgow, United Kingdom — 4Laboratory for Emerging Nanometrology Braunschweig, Germany
During recent years, a number of studies have been performed to investigate the interaction of matter with structured light modes. These studies paved the way for the application of such modes in optical traps and tweezers, classical and quantum communication, as well as atomic magnetometers [1]. In the course of the latter work, it was observed that the transmission of structured-light polarization components through the atomic sample is very sensitive to the frequency of the incident radiation. To provide the theoretical background for polarization spectroscopy with structured beams, we perform calculations in the framework of the density matrix approach and the Liouville-von Neumann equation. For illustration purposes, we apply our general theory to the 5s 2S1/2 (F=3) − 5p 2P3/2 (F=4) transition in Rb85. Based on the results of our calculations, we find that the spatially dependent transmission pattern allows for the analysis of laser frequency. This opens up new opportunities for the application of structured light in laser frequency locking schemes.
[1] F. Castellucci et al., PRL 127, 233202 (2021)
Keywords: Light-matter interaction; Structured light; Polarization spectroscopy; Laser frequency locking