Figure A1


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Normalized intensities of highly focused beams that propagate along the z direction with no index mismatch (left) or with n = 1.52 for z < 0 and n = 1.33 for z > 0 (right). We compare a focus 10 μm above the coverslip with no index mismatch with the actual focus taking spherical aberration into account with the index mismatch. The focus is closer to the interface by a factor of 1.18. The interface location is shown by the dashed white line. Far right, and bottom: line scan through the points of maximal intensities (blue: focus with no index mismatch; black: with mismatch).

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