Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.33: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Single ion saturation as efficiency measurement for light-matter interaction — •Robert Maiwald1,2, Andrea Golla1,2, Martin Fischer1,2, Marianne Bader1,2, Markus Sondermann1,2, and Gerd Leuchs1,2 — 1Institut für Optik, Information und Photonik (IOIP), Universität Erlangen-Nürnberg, Erlangen — 2Max-Planck-Institut für die Physik des Lichts (MPL), Erlangen
The characteristic answer of a two-level system to a resonantly exciting laser field can be used as a measurement for the efficiency of light-matter interaction, aiming at applications such as quantum memories and quantum networks. We follow a free space approach where the incoming light field is mode-matched to a linear dipole transition of a single atomic ion. For this purpose we prepare a spatially and temporally formed light mode that has – after focusing – an almost perfect overlap with the emission of a linear dipole [1]. With a specialized ion trap we place a single 174Yb+ ion in the focus of a parabolic mirror covering 81 % of the solid angle surrounding the ion [2]. This set-up allows one to directly interface the tailored light mode with the single ion. We use the saturation of the ion’s cooling transition as a measure for the light-matter interaction efficiency to characterize the quality of the incoming light mode and the spread of the parabolic mirror’s focal spot. Additionally, imaging the ion’s fluorescence via the parabolic mirror yields the highest resolution achieved so far with single ions.
[1] A. Golla et al., Eur. Phys. J. D 66, 190 (2012)
[2] R. Maiwald et al., Phys. Rev. A 86, 043431 (2012)