Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 14: Ultracold plasmas and Rydberg systems I (with A)
Q 14.7: Vortrag
Montag, 29. Februar 2016, 18:30–18:45, f303
Enhancement of a Single-Photon Transistor by Stark-Tuned Förster Resonances — •Christoph Tresp1, Hannes Gorniaczyk1, Przemyslaw Bienias2, Asaf Paris-Mandoki1, Weibin Li3, Ivan Mirgorodskiy1, Christian Zimmer1, Hans Peter Büchler2, Igor Lesanovsky3, and Sebastian Hofferberth1 — 15. Physikalisches Institut, Universität Stuttgart, Germany — 2Institut für theoretische Physik III, Universität Stuttgart, Germany — 3School of Physics and Astronomy, University of Nottingham, United Kingdom
We report on the use of Stark-tuned Förster resonances to enhance the gain of a Rydberg mediated single-photon transistor and the non-destructive detection of single Rydberg atoms. We show that our all-optical detection scheme enables high-resolution spectroscopy of Förster resonances, revealing the fine structure splitting of Rydberg states and the splitting of Zeeman-substates. We discuss how excitation hopping between a stored Rydberg excitation and incoming source polaritons can be minimized by choice of the Rydberg states. We then proceed to use a particularly suited two-color resonance to demonstrate scattering of over 100 source photons from a single Rydberg excitation, demonstrating efficient all optical Rydberg detection. Finally, we investigate the Rydberg transistor in coherent operation by reading out the gate photon after scattering source photons. Due to projection of the stored spin wave and phase imprinting, the coherence of the gate excitation is affected by scattered and transmitted source photons.