Figure 5.

(a) Scattering diagram of a single C. rubi scale taken by an imaging scatterometer. The black strip at 180° is the shadow of a thin glass micropipette carrying the scale. The white circles indicate the scattering angles of 30°, 60° and 90°. (b) Schematic scattering diagram summarizing the FDTD simulation results for scattering from 20 domains exposed to normally incident light (TM polarized). Each coloured dot represents the zeroth-order scattering from one domain. The dark grey structures surrounding each dot represent higher scattering orders having almost no intensity. Scattered light with wavelength 393 nm is coloured violet, 484 nm blue, 514 nm blue–green and 545 nm green. The intensity of the scattered light is not taken into account in the coloration but is reported in table 1. (c) Same as in (b) but for the domains (1 4 5) (numbers 1–8) and (2 3 7) (numbers 9–15) only and for incident light (TM polarized) with various non-normal angles of incidence [θ, ϕ] (table 2).