Figure 3 | Scientific Reports

Figure 3

From: Graded pitch profile for the helicoidal broadband reflector and left-handed circularly polarizing cuticle of the scarab beetle Chrysina chrysargyrea

Figure 3

(a) Wavelength dependence of the effective penetration depth <η> as calculated from equation (2); four spectral regions I–IV are identified. The U-shaped curves are the calculated attenuation length η for selected pitch values between 240 and 569 nm and two values of in-plane birefringence (Δn). (b) Schematic representation of the cuticle of the beetle C. chrysargyrea deduced from the spectral dependence of <η>.

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