Fig. 7
From: Unique wing scale photonics of male Rajah Brooke’s birdwing butterflies
Imaging scatterometry of a green scale. a Side-view of a single scale glued to the end of a pulled glass micropipette. The width of the rectangles indicate the size of the illumination area used in panels b-d. b-d Scatterograms resulting from illumination of a small (b), medium-sized (e) and large (f) area. e, f Angle dependence of the diffraction patterns obtained with a narrow-aperture illumination beam (as in panel b) for TE- and TM-polarized light with the angle of light incidence increasing in ~7.5° steps. g, h Calculated angle dependence of the full photonic structure (see Fig. 8a, iv) for TE- and TM-polarization with the angle of light incidence varying from 0 to 80° in 10° steps