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Loading of large ion Coulomb crystals into a linear Paul trap incorporating an optical cavity
Authors:P. Herskind  A. Dantan  M. B. Langkilde-Lauesen  A. Mortensen  J. L. Sørensen  M. Drewsen
Affiliation:1. QUANTOP, Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, 8000, ?rhus C., Denmark
Abstract:We report on the loading of large ion Coulomb crystals into a linear Paul trap incorporating a high-finesse optical cavity (?~3000). We show that, even though the 3-mm diameter dielectric cavity mirrors are placed between the trap electrodes and separated by only 12 mm, it is possible to produce in situ ion Coulomb crystals containing more than 105 calcium ions of various isotopes and with lengths of up to several millimeters along the cavity axis. We show that the number of ions inside the cavity mode is, in principle, high enough to achieve strong collective coupling between the ion Coulomb crystal and the cavity field. The results thus represent an important step towards ion trap based Cavity Quantum ElectroDynamics (CQED) experiments using cold ion Coulomb crystals.
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