Figure 9.

(a) The electric field distribution in a focused light beam incident of a layered sample. (b) The field is distorted significantly at the edge of a layered sample. The edge is indicated by the vertical, blue dashed line.¹⁸⁶ (c) Spectral distortions due to edge effects is presented. When light is focused onto an edge, there is significant baseline variation as indicated by the green spectrum. This edge effect reduces as one moves away from the edge as the indicated by the black spectrum.¹⁸²