C. Raab et al., Motional sidebands and direct measurement of the cooling rate in the resonance fluorescence of a single trapped ion, PHYS REV L, 85(3), 2000, pp. 538-541
Resonance fluorescence of a single trapped ion is spectrally analyzed using
a heterodyne technique. Motional sidebands due to the oscillation of the i
on in the harmonic trap potential are observed in the fluorescence spectrum
. From the width of the sidebands the cooling rate is obtained and found to
be in agreement with the theoretical prediction.