Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 28: Ultracold plasmas and Rydberg systems (with Q)

A 28.8: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

Probing electric fields spatially resolved inside hollow core fibers with Rydberg atoms — •Daniel Weller¹, Georg Epple^1,2, Josephine Gutekunst¹, Christian Veit¹, Tilman Pfau¹, Philip Russel², and Robert Löw¹ — ¹5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — ²Max Planck Institute for the Science of Light and Department of Physics, University of Erlangen, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany

The exceptional large polarizability of highly excited Rydberg atoms makes them of great interest for sensitive AC and DC electric field sensors. In addition, long-range interactions between the Rydberg atoms give rise to phenomena such as the Rydberg blockade, enabling the creation of optical nonlinearities at the single photon level. A promising route to technically feasible, miniaturized, room-temperature devices is based on the excitation of Rydberg atoms inside hollow-core photonic crystal fiber (HC-PCF). The confinement of both atoms and light enforces a large inline interaction region, resulting in perfect atom-light coupling. Recently, we demonstrated coherent three-photon excitation to Rydberg states in a cesium vapor confined in both kagome-style HC-PCF and capillaries. Spectroscopic signals exhibiting sub-Doppler features for principal quantum numbers up to n = 46 revealed line shifts. To investigate these shifts in detail, two kinds of spacially resolved spectroscopy were implemented: one uses an array of field plates along the fiber, the other relies on higher order modes of the excitation beams, to locally select atoms within the fiber.