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Q: Fachverband Quantenoptik und Photonik

Q 11: Poster: Quantum Optics and Photonics I

Q 11.12: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Large bandwith excitation of rydberg atoms in thermal vapor cells — •andy rico, alban urvoy, robert löw, harald kübler, and tilman pfau — 5. Physikalisches Institut, University of Stuttgart, Germany

Over the past years, significant experimental effort has been made towards studying Rydberg atoms in vapor cells. It has given new insight into the fundamental physics of ensemble of Rydberg atoms, as well as opened the door for technical applications, such as MW electric field sensing among others. In most previous studies of Rydberg atoms in vapor cells, attaining a high enough excitation bandwidth was critical to obtain both fast enough excitation dynamics and high Rydberg population. Here we first present new results on the observation of electric field modulation up to several GHz in a cesium vapor cell through Rydberg excitation. The large excitation bandwidth allows here the system to follow the fast modulation. We also discuss the potential and limitations of this scheme as a light modulator. Second, we examine the recently observed optical bistability in a vapor cell [1], which is obtained for high Rydberg population,for different orbital angular momentum states. We investigate this effect in our system and discuss the possible nature of the underlying mechanism.

[1] C. Carr et al., PRL 111, 113901 (2013)