Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.17: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Coherent Rydberg Excitation in Thermal Caesium Vapour — •Alban Urvoy, Fabian Ripka, Christian Veit, Tilman Pfau, and Robert Löw — 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart Germany
Rydberg atoms are promising candidates for the realisation of quantum devices, making use of their long-range atom-atom interaction. The presence of van der Waals-type interaction among Rydberg states has recently been demonstrated in thermal Rubidium vapour using a pulsed amplifier [1]. In Caesium, the excitation scheme 6S1/2 → 7P3/2 → nS, nD has the advantage, compared to that in Rubidium, that the upper transition may be driven at a wavelength of approx. 1064 nm. At this wavelength it is possible to reach high laser powers with CW fibre amplifiers and we therefore can expand the work of [1] to longer time scales with the use of a Pockels cell. However due to the strong Doppler effect present in thermal vapours, the wavelength ratio between the two driving laser fields plays a crucial role in the system and has to be considered carefully.
In this three level ladder system in Cs, we present our results on the coherence properties for the steady-state EIT spectroscopy as well as for the pulsed nanosecond regime.
T. Baluktsian, B. Huber, et al., arXiv:1212.0690 [physics.atom-ph]