Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 8: Quantum Effects: Interference and Correlations II / Entanglement and Decoherence I
Q 8.3: Vortrag
Montag, 8. März 2010, 17:15–17:30, A 310
Absorption of single photons by a single ion — •Lukas Slodicka1, Gabriel Hetet1, Sebastian Gerber1, Markus Hennrich1, and Rainer Blatt1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria — 2Österreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, A-6020 Innsbruck, Austria
A single trapped ion is an ideal system to investigate the most essential physical processes in atom-photon interfaces.
Here, we report on absorption spectroscopy experiments with a single trapped 138Ba+ ion. We focus a weak and narrowband Gaussian light beam onto an optically cooled ion using a high numerical aperture lens. Single ion absorption was observed and peak absorption of up to 3% was measured, close to the limit set by the size of solid angle covered by the input lens. Furthermore, we observe electromagnetically induced transparency by tuning a dressing beam over a two photon resonance in a three level lambda system. A 50% inhibition of the absorption due to population trapping was measured.
Our results are first important steps towards realizing an efficient quantum network using single atoms and single photons in free space.