Figure 5: Fluorescence rate of an ion in dependence on the electric field.
Ey (along the y-direction) is caused by the potential applied to the trap electrodes. The ion probes the intensity profile of the dipole beam in the vicinity of its centre. The centre of this beam profile can be approximated by a least square fit of a quadratic function with an uncertainty of 6.0 mV m−1 (solid line). The potential at the electrodes can be calibrated to an electric field, as described in the Methods section, with a relative error of 11%. The vertical error bars denote the statistical error (1σ) of the fluorescence rate.
