Authors Referees APS Members |
December 2007, to be published in Physical Review A
Doppler cooling of calcium ions using a dipole-forbidden transition
Doppler cooling of calcium ions has been experimentally demonstrated using the S$_{1/2}$$\longrightarrow$D$_{5/2}$ dipole-forbidden transition. Scattering forces and fluorescence levels a factor of 5 smaller than for usual Doppler cooling on the dipole allowed S$_{1/2}$$\longrightarrow$P$_{1/2}$ transition have been achieved. Since the light scattered from the ions can be monitored at (violet) wavelengths that are very different from the excitation wavelengths, single ions can be detected with an essentially zero background level. This, as well as other features of the cooling scheme, can be extremely valuable for ion trap based quantum information processing. © 2008 The American Physical Society.
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