Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: Precision Spectroscopy of atoms and ions I (joint session A/Q)
Q 2.5: Vortrag
Montag, 11. März 2019, 11:30–11:45, S HS 2 Physik
Spectroscopy of the 1001 nm transition in atomic dysprosium — •Niels Petersen1,2, Marcel Trümper1, Florian Mühlbauer1, Gunther Türk1, and Patrick Windpassinger1,2 — 1QUANTUM, Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany — 2Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz, Germany
Dysprosium is a rare-earth element with one of the largest ground-state magnetic moments (10 Bohr magnetons) in the periodic table. Therefore, the dipole-dipole interaction is not a small perturbation but becomes comparable in strength to the s-wave scattering in ultracold dysprosium gases. The physical properties of the trapped atomic sample, such as its shape and stability are significantly influenced by the long-range and anisotropic dipole-dipole interaction.
Narrow-linewidth transitions constitute highly sensitive probes for external fields, internal properties and interactions between atoms in quantum gases. Due to the long lifetimes of the upper states these transitions can be utilized to generate and precisely control mixtures of long-living excited state atoms and ground state atoms. The lifetime of the excited state of the 1001 nm ground state transition in atomic dysprosium is predicted to be on the order of a few milliseconds. We report on spectroscopy of cold dysprosium atoms in an optical dipole trap on the 1001 nm transition and present measurements of the excited state lifetime.