Figure 2

Computational results for traps with a well defined zero potential background.

(a) Reconstructions of the OR-gate trap with MRAF and OMRAF methods. We also show details of the local reconstruction error (bottom insets) and the local phase (right insets). In the phase plots, obtained after 30 iterations, we use black to white to represent 0 to 2π and red dots to mark vortex cores. (b) Illustrates the method for picking the optimal offset, Δ, measured in units of the peak amplitude in the target pattern. We perform a single iteration of the algorithm, for different offsets, to produce patterns such as those shown in the insets. We then choose the lowest value of Δ (indicated by the dashed line) which gives no vortices within or in this first iteration. (c) Improvement in the trap reconstruction associated with the offset.