Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 23: Precision Spectrosocopy III - trapped ions (joint session A/Q)
Q 23.2: Vortrag
Montag, 5. März 2018, 16:45–17:00, K 1.016
Measuring the temperature and heating rate of a trapped single ion by imaging — •Bharath Srivathsan1,2, Martin Fischer1,2, Lucas Alber1,2, Markus Weber1,2, Markus Sondermann1,2, and Gerd Leuchs1,2,3 — 1Max-Planck-Institute for the Science of Light, Erlangen, Germany — 2Friedrich-Alexander University Erlangen - Nürnberg (FAU), Department of Physics, Erlangen, Germany — 3Department of Physics, University of Ottawa, Canada
We present a technique to measure the temperature and the heating rate of a Doppler-cooled, single ion confined in a harmonic trap. In our experiment, we use a single 174Yb+ ion trapped at the focus of a parabolic mirror covering almost 4π solid angle. The fluorescence light scattered by the ion from the cooling laser is imaged onto an EMCCD camera. We measure the size of this image while varying the power of the cooling laser. From this measurement data, we determine the heating rate by a fit to a well-known theoretical model for cooling in a trap [1]. Our method enables one to measure the heating rate directly at the Doppler limit, i.e. in a regime which is generally inaccessible to other common techniques.
[1] Stig Stenholm, Rev. Mod. Phys. 58, 699 (1986).