Figure 2
(a) Recorded intensity pattern obtained with unpolarized visible light. A circular ring-like structure is clearly visible. (b)–(f) Recorded intensity patterns obtained with LH polarized light of increasing photon energy, as stated in the labels. The colour bar limits are different for each panel, and they have been chosen to better highlight the features of interest. (g) Radial profiles extracted from the region contained between the two white dashed lines in (c). All the profiles are normalized to the intensity at the centre of the image (r = 0). The vertical black dashed line highlights the average radius of the circular structure in (a). For increasing energy, the amplitude of the peak corresponding to the ring-like feature decreases, while its width is enhanced. (h) Normalized integrated intensity as a function of the photon energy. The black dots represent the experimental data, while the continuous coloured lines show the predicted energy dependence of the COMIX transmittance for mirror roughnesses in the 0–4 nm (r.m.s.) range. |