This article is devoted to the study of the structural layers origin of the mixed color blue, yellow-green and red reflections from elytra of the Megacephala Regalis Citernii, a bug species. So, we proceed by scanning electron microscope (SEM) and spectrophotometry characterization of these layers to explain the origin of the mixed color blue, yellow-green and red of the elytra. We also use a numerical method to simulate the spectrum measured. Indeed, the measurements spectrum gives three main pic reflectance wave length is respectively: λ1 = 491,5 nm, λ2 = 624,5 nm, and λ3 = 654,5 nm and are the area of the color of blue, yellow-green and red. The calculation of the dominant wavelength is estimated at λ1 = 515 nm, λ2 = 551,04 nm; λ3 = 621,68 nm. The numerical results show also three main peak at the spectrum calculation: λ1= 493 nm, λ2 = 581,2 nm, λ3 = 625,68 nm. These results confirm that structure responsible the mixed color of the elytra of the Megacephala Regalis Citernii, is a multilayer. Finally, these multilayers are iridescent. It is possible to consider artificial reproduction for the multilayer through a process of deposits in order to manufacture materials at nanometer scale with selective reflection.

Reflectance Structural Color