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Q: Fachverband Quantenoptik und Photonik
Q 6: Quantum Optics (Miscellaneous) I
Q 6.7: Vortrag
Montag, 14. März 2022, 15:45–16:00, Q-H14
Transient dipolar interactions in a thin thermal vapor — •Felix Moumtsilis1, Max Mäusezahl1, Florian Christaller1, Hadiseh Alaeian2, Harald Kübler1, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Departments of Electrical & Computer Engineering and Physics & Astronomy, Purdue University, West Lafayette, IN 47907, USA
Micrometer-sized cells for atomic vapors are powerful devices in the realm of fundamental research and applied quantum technology. The effect of light-induced atomic desorption (LIAD) is exploited to produce high atomic densities (n ≫ k3) in a rubidium vapor cell. An intense off-resonant laser is pulsed on a micrometer-sized sapphire-coated cell, which results in the desorption of atomic clouds from both internal surfaces. The resulting transient (LIAD-induced) atomic densities are investigated by time-resolved absorption spectroscopy for the D1 and D2 line respectively [1]. This time dependent broadening and line shift is attributed to dipole-dipole interactions. As this timescale is much faster than the natural atomic lifetime, the experiment probes the dipolar interaction in a non-equilibrium situation beyond the usual steady-state, assumed in the derivation of the Lorentz-Lorenz shift. This fast switching of the atomic density and dipolar interactions could be the basis for future quantum devices based on the excitation blockade.
white...black [1] Christaller et al., arXiv:2110.00437 (2021)