Doppler cooling of calcium ions using a dipole-forbidden transition
نویسندگان
چکیده
Richard J. Hendricks, Jens L. Sørensen, Caroline Champenois, Martina Knoop, and Michael Drewsen* QUANTOP—Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, DK-8000 Århus C, Denmark Physique des Interactions Ioniques et Moléculaires (CNRS UMR 6633), Université de Provence, Centre de Saint Jérôme, Case C21, 13397 Marseille Cedex 20, France Received 12 July 2007; published 4 February 2008
منابع مشابه
Isotope-selective photo-ionization for calcium ion trapping
We present studies of resonance-enhanced photo-ionization for isotope-selective loading of Ca into a Paul trap. The 4s S0 ↔ 4s4p P1 transition of neutral calcium is driven by a 423 nm laser and the atoms are photo-ionized by a second laser at 389 nm. Isotope-selectivity is achieved by using crossed atomic and laser beams to reduce the Doppler width significantly below the isotope shifts in the ...
متن کاملDirect frequency-comb spectroscopy of a dipole-forbidden clock transition in trapped 40Ca+ ions.
We demonstrate direct frequency-comb (FC) spectroscopy of the dipole-forbidden 4s(2)S(1/2)-3d(2)D(5/2) transition in trapped (40)Ca(+) ions using an unamplified FC laser. The excitation is detected with nearly 100% efficiency using a shelving scheme in combination with single-ion imaging. The method demonstrated here has the potential to reach hertz-level accuracy, if a hertz-level linewidth FC...
متن کاملHigh-resolution optical spectroscopy of Os−with a view to laser cooling of atomic anions
Atomic anions are generally not amenable to optical spectroscopy because they are loosely bound systems and rarely have bound excited states. Until recently, there was only one known negative ion with a strong bound–bound electronic transition, the osmium anion Os−. The electric-dipole transition between the F9/2 ground and DJ excited state of this ion provides unique insight into the structure...
متن کاملDoppler cooling to the quantum limit.
Doppler cooling on a narrow transition is limited by the noise of single scattering events. It shows novel features, which are in sharp contrast with cooling on a broad transition, such as a non-gaussian momentum distribution, and divergence of its mean square value close to the resonance. We have observed those features using 1D cooling on an intercombination transition in strontium, and compa...
متن کاملDouble-EIT ground-state laser cooling without blue-sideband heating
– We discuss a laser cooling scheme for trapped atoms or ions which is based on double electromagnetically induced transparency (EIT) and makes use of a four-level atom in tripod configuration. The additional fourth atomic state is coupled by a strong coupling laser field to the usual three-level setup of single-EIT cooling. This effectively allows to create two EIT structures in the absorption...
متن کامل