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Modeling of light interaction with exoskeletons of scarab beetles
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-2749-8008
2017 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 56, no 9, 2510-2516 p.Article in journal (Refereed) Published
Abstract [en]

Some beetles of the family Scarabaeidae produce brilliant metallic-looking colors by their pure dielectric exoskeletons and reflect light with a high degree of circular polarization. In the present work, we discuss three models for simultaneously describing scattering, spectral, and polarization characteristics of scarab beetles. Each model consists of three slabs: an outer thin epicuticle, an exocuticle having a helicoidal structure, and a thick uniform slightly absorbing endocuticle. Scattering features are defined by rough interfaces of the epicuticle and/or nonuniformities of the exocuticle. As an example, a slightly modified model of an earlier study of Chrysina aurata is considered. The modification is aimed at including surface and volume nonuniformities that affect not only spectral and polarization properties but also scattering. Another example of using the proposed models is based on the analysis of image formations of a specimen of the species Mimela chinensis, which was studied in a polarizing microscope at different magnifications. The results show that the proposed models can be applied for explanation of light interaction with the exoskeletons of scarab beetles. (C) 2017 Optical Society of America

Place, publisher, year, edition, pages
OPTICAL SOC AMER , 2017. Vol. 56, no 9, 2510-2516 p.
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URN: urn:nbn:se:liu:diva-136585DOI: 10.1364/AO.56.002510ISI: 000398087100040PubMedID: 28375360OAI: oai:DiVA.org:liu-136585DiVA: diva2:1089994
Note

Funding Agencies|Svenska Forskningsradet Formas [2009-1425]

Available from: 2017-04-21 Created: 2017-04-21 Last updated: 2017-04-21

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Valyukh, SergiyJärrendahl, Kenneth
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CiteExportLink to record
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