Resumo

RINCON-CELIS, Raúl L; BERNAL-GARCIA, Diego; VINCK-POSADA, Herbert  e  COLORADO, Gabriel. FDFD SIMULATION TO DESCRIBE IRIDESCENCE PHENOMENA ON Euchroma gigantea 's ELYTRA. Momento [online]. 2015, n.51, pp.16-30. ISSN 0121-4470.

Abstract In this work we present a discussion about the iridescence phenomena exhibited on Euchroma gigantea 's elytra (1), a beetle which belongs to the family of Buprestidae, the jewel beetles. The reflectance suggest that iridescence phenomena is structural, the same as Morpho butterflies or the Hoplia coerulea beetles. The SEM images reveals a superficial structure of the elytra, as an aleatory arrange of defects in a dielectric organic substrate. As the main component on exoskeletons of arthropods is the chitin, we suppose the elytra are completely made of chitin and also is assumed the defects are air columns. That is how the system is modeled as a two dimensional photonic crystal. Because of the characteristics energies of each active mode calculated for the estructure doesn't belong to visible range, is concluded that the iridiscence phenomena is not caused by its superficial structure.

Palavras-chave : Iridescence; Euchroma gigantea; photonic crystal; elytron; FDFD.

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