Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 25: Poster IV
A 25.23: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent A
Nuclear photoabsorption in 229Th using twisted light — •Tobias Kirschbaum and Adriana Pálffy — Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Twisted light refers to light beams that carry orbital angular momentum. The past decade has witnessed several studies of the interaction of these beams with matter, in particular with atomic systems. Among others, twisted light beams are used in quantum metrology to minimize the unwanted light shift in atomic clock transitions [1]. A compelling alternative for these atomic clocks, hardly affected by such shifts, is the 229Th nucleus which has a long-lived first excited state at ≈ 8 eV [2].
Here, we investigate new avenues for the photoexcitation of the 229Th nuclear isomer using vortex beams. We focus on spatial and temporal excitation patterns induced by the twisted light field for the magnetic dipole and electric quadrupole channels of the nuclear transition. Nuclear excitation in both solid-state targets presenting nuclear hyperfine splitting as well as single ions is investigated and the advantages compared to plane wave driving are highlighted.
[1] R. Lange et al., Phys. Rev. Lett. 129, 253901 (2022).
[2] E. Peik et al., Quantum Sci. Technol. 6, 034002 (2021).
Keywords: Nuclear clock; Twisted light; Quantum optics