Fig. 6From: Unique wing scale photonics of male Rajah Brooke’s birdwing butterfliesPolarizing optics of the green scales. a, b Local epi-illumination of a green scale with normally-incident light linearly-polarized perpendicular (TE) and parallel (TM) to the ridges. c Reflectance spectra corresponding to panel (a) and (b). d, e Photographs of a dorsal right wing under about perpendicular and oblique (~45°) illumination. Scale bars: a, b 5 μm, d, e 1 cmBack to article page