SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Poster I
A 12.22: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Interaction of twisted light with the 229Th nuclear clock candidate — •Tobias Kirschbaum and Adriana Pálffy — Julius-Maximilians-Universität Würzburg, Germany
Twisted light refers to light beams that carry orbital angular momentum. The interaction of twisted light with matter is a rapidly developing topic in optics and related fields thereof [1], in particular due to the modification of selection rules in atomic photo-excitation rendering dipole forbidden channels possible. In turn, these channels become attractive for next-generation atomic clocks.
A compelling alternative for these novel atomic clocks is the 229Th nucleus which has its first excited state at ≈ 8 eV accessible by narrow-band VUV lasers. The transition from the ground to the excited state has a radiative lifetime of a few hours [2] and presents M1/E2 multipole mixing in which the M1 channel strongly dominates. Here, we present a theoretical approach to excite the 229Th isomer with twisted light fields. Thereby, we investigate how the efficiency of the direct radiative excitation of the isomeric state can be increased and study the selective driving in targets with nuclear hyperfine splitting.
[1] A. Afanasev et al., Phys. Rev. A 97, 023422 (2018).
[2] E. Peik et al., Quantum Sci. Technol. 6, 034002 (2021).