Stuttgart 2012 – wissenschaftliches Programm
Q 35.58: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II
Rydberg EIT in thermal caesium vapour — •Alban Urvoy, Lara Bauer, Harald Kübler, Tilman Pfau, and Robert Löw — 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart Germany
Rydberg atoms are promising candidates for the realization of quantum devices, making use of the long-range atom-atom interactions. Results towards the control of Rydberg excitations in time domain have recently been obtained with thermal rubidium vapour . In caesium, the excitation scheme 6S1/2 → 7P3/2 → nS, nD has the advantage that the upper transition is driven at a wavelength of approx. 1064 nm. It is possible at this wavelength to reach high powers in a continuous wave regime and we therefore hope to continue the work of  in a more flexible way.
We present spectroscopic results for this three level ladder system. The data exhibits transitions from EIT to enhanced absorption. We show that this is a consequence of the optical pumping out of the three level model of EIT.
 B. Huber, et al., Phys. Rev. Lett. 107, 243001 (2011)