SIMULACION EN FDFD PARA DESCRIBIR EL FENOMENO DE IRIDISCENCIA EN LOS ELITROS DEL Euchroma gigantean
FDFD SIMULATION TO DESCRIBE IRIDESCENCE PHENOMENA ON Euchroma gigantea’s ELYTRA
DOI:
https://doi.org/10.15446/mo.n51.56187Keywords:
Iridiscencia, Euchroma gigantea, Cristal fotónico, élitro, FDFD. (es)Iridescence, Euchroma gigantea, photonic crystal, elytron, FDFD. (en)
Se presenta una discusión acerca del fenómeno de iridiscencia presente en los élitros del Euchroma gigantea, insecto que pertenece a la familia Buprestidae, los denominados escarabajos joya. Las ondas reflejadas sugieren que el fenómeno de iridiscencia es estructural, justo como se manifiesta en las mariposas Morpho o en los escarabajos Hoplia coerulea. Las imágenes obtenidas por SEM muestran una la estructura superficial de los élitros como un arreglo aleatorio de defectos en un sustrato dieléctrico orgánico.
Como el componente principal del exoesqueleto de los artrópodos es la quitina, se hace la suposición que el sustrato es completamente quitina y también se asume que los defectos son columnas de aire. Es así como el sistema es modelado como un cristal fotónico dos-dimensional. Debido a que las energías características obtenidas para los modos activos de la estructura no pertenecen al rango visible, se concluye que el fenómeno de iridiscencia no es causado por la estructura superficial del élitro.
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.
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