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Exposing different in-depth pitches in the cuticle of the scarab beetle Cotinis mutabilis
CINVESTAV, Mexico.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-2749-8008
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9229-2028
2017 (English)In: MATERIALS TODAY-PROCEEDINGS, ELSEVIER SCIENCE BV , 2017, Vol. 4, no 4, p. 4969-4978, article id 4Conference paper, Published paper (Refereed)
Abstract [en]

The cuticle of the scarab beetle Cotinis mutabilis reflects left-handed polarized light indicating the presence of a helicoidal structure. Different in-depth pitches in the cuticle are corroborated by optical microscopy images of the cuticle which originally is yellowish or reddish but becomes greenish after gently scratching its top side. Using the Mueller-matrix formalism the degree of polarization (total and circular) of reflected light is determined for unpolarized incident light. The effects of the finite thickness of the cuticle on the broadening and strength of the selective Bragg reflection are discussed on the basis of dispersion relations for optical modes in helicoidal structures and simulated spectra. (C) 2017 The Author(s). Published by Elsevier Ltd.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 4, no 4, p. 4969-4978, article id 4
Series
Materials Today - Proceedings, ISSN 2214-7853
Keyword [en]
Structural color; beetle cuticle; near-circular polarization
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:liu:diva-143756DOI: 10.1016/j.matpr.2017.04.103ISI: 000416443900006OAI: oai:DiVA.org:liu-143756DiVA, id: diva2:1166616
Conference
The Living Light Conference (May 4 – 6) 2016, San Diego (USA)
Note

Funding Agencies|Conacyt-Mexico; Knut and Alice Wallenberg foundation; Swedish Research Council; Carl Tryggers foundation; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]

Available from: 2017-12-15 Created: 2017-12-15 Last updated: 2017-12-15

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