Characterization of the iridescence-causing multilayer structure of the Ceroglossus suturalis beetle using bio-inspired optimization strategies

Ana Luna; Demetrio Macias; Diana Skigin; Marina Inchaussandague; Daniel Schinca; Miriam Gigli; Alexandre Vial

Characterization of the iridescence-causing multilayer structure of the Ceroglossus suturalis beetle using bio-inspired optimization strategies

Ana Luna ^{1, 2} Demetrio Macias ³ Diana Skigin ^{1, 2} Marina Inchaussandague ^{1, 2} Daniel Schinca ⁴ Miriam Gigli ¹ Alexandre Vial ³

1 UBA - Universidad de Buenos Aires [Buenos Aires]

2 IFIBA - Instituto de Física de Buenos Aires

3 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique

ICD - Institut Charles Delaunay

4 CIOp - Centro de Investigaciones Ópticas [La Plata]

Abstract : We investigate the iridescence exhibited by Ceroglossus suturalis beetles, which mostly live endemically in the southern end of South America. Two differently colored specimens have been studied. We observed and characterized the samples by different microscopy techniques, which revealed a multilayer structure within their cuticle. Using measured reflectance spectra as input data, we applied heuristic optimization techniques to estimate the refractive index values of the constituent materials, to be introduced within the theoretical model. The color of the samples was calculated for different incidence angles, showing that multilayer interference is the mechanism responsible for the observed iridescence.

Keywords : Structural color Scanning electron microscopy Refractive index Mueller matrices Complex dielectric constant Heuristic optimization

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Optics / Photonic

Complete list of metadatas

https://hal-utt.archives-ouvertes.fr/hal-02297019
Contributor : Daniel Gavrysiak <>
Submitted on : Wednesday, September 25, 2019 - 4:34:54 PM
Last modification on : Thursday, September 26, 2019 - 1:26:06 AM

Characterization of the iridescence-causing multilayer structure of the Ceroglossus suturalis beetle using bio-inspired optimization strategies

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Characterization of the iridescence-causing multilayer structure of the Ceroglossus suturalis beetle using bio-inspired optimization strategies

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