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Snapshots of the electric field amplitude from FDTD simulations for focused laser beams traveling in the +z direction. The x component of the electric field on the xz plane is plotted linearly in grayscale at 4.975 fs intervals from left to right. The maximum brightness corresponds to 1.059 × 105 V/m. (a) (0, 0) mode. [ Media1 (2.2MB, MOV) ] (b) (1, 0) mode. [ Media2 (2.2MB, MOV) ] (c) (2, 0) mode. [ Media3 (2.2MB, MOV) ]
