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Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 22: Poster Session - Atomic Physics III

A 22.4: Poster

Mittwoch, 11. März 2020, 16:00–18:00, Empore Lichthof

Light-induced atomic desorption in thermal µ-cells — •Felix Moumtsilis, Florian Christaller, Max Mäusezahl, Fabian Ripka, Hadiseh Alaeian, Harald Kübler, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart, Germany

Micrometer-sized cells for atomic vapors are powerful devices in the realm of fundamental research and applied quantum technology. To reach significant optical densities along the short optical paths in such cells, temperatures exceeding 300C have to be applied. This however is accompanied by stronger collisional effects, the excitation of surface-polaritons and technical difficulties in the experimental setups due to large temperature gradients. We present an experimental approach exploiting the effect of light-induced atomic desorption (LIAD) [1, 2]. In this configuration, atoms are desorbed from the cell’s glass surface by intense nanosecond-pulses at 532 nm and provide a temporarily dense cloud of atoms. These atoms eventually reach the opposing glass surface, where they are adsorbed again. Using this technique, we locally increase the density to several hundreds of atoms per µ m3 on a nanosecond timescale. Here we report on the latest systematic time-resolved LIAD measurements in a thermal rubidium cell.

[1] Meucci et al., EPL 25, 639 (1993)

[2] Atunov et al., Phys. Rev. A 67, 053401 (2003)

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