Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.16: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Measuring non-linear susceptibility in a Rydberg EIT medium — •Clément Hainaut1, Annika Tebben1, Valentin Walther2, Renato Ferracini Alves1, Yongchang Zhang2, Andre Salzinger1, Nithiwadee Thaicharoen1, Gerhard Zürn1, Thomas Pohl2, and Matthias Weidemüller1,3 — 1Physikalisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 226, 69129 Heidelberg, Germany — 2Department of Physics and Astronomy, Ny Munkegade 120, building 1525 420, 8000 Aarhus C, Denmark — 3Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
Rydberg-Rydberg interactions affect the propagation of light in a cold atomic gas under EIT conditions. Due to this interaction, the system reveals an effective photon-photon interaction which results in a non-local, non-linear susceptibility of the medium.
In our work, we want to experimentally measure the enhancement of the susceptibility due to resonant Rydberg dressing of the atoms. To do so, we work in the limit of low optical density of the probe beam per blockade radius. In this regime, the probe light field experiences substantial non-linear effects which affect its intensity distribution after propagation. We implement a spatially structured probe beam and a diffraction limited imaging system for measuring correlations in the intensity pattern after propagation through the medium.