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Graded pitch profile for the helicoidal broadband reflector and left-handed circularly polarizing cuticle of the scarab beetle Chrysina chrysargyrea
Cinvestav, Mexico.
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
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9229-2028
2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 6456Article in journal (Refereed) Published
Abstract [en]

The cuticle of the beetle Chrysina chrysargyrea reflects left-handed polarized light in the broad spectral range from 340 to 1000 nm. Interference oscillations in the experimental Mueller-matrix spectroscopic ellipsometry data reveal that transparent materials comprise the cuticle. A spectral analysis of the interference oscillations makes evident that the pitch profile across the cuticle is graded. The graded pitch and effective refractive indices are determined through non-linear regression analysis of the experimental Mueller matrix by using a cuticle model based on twisted biaxial dielectric slices. Non-uniformity in cuticle thickness as well as in pitch profile near the cuticle surface account for depolarizance of the Mueller matrix. Transmission electron microscopy supports the reliability of the results.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2018. Vol. 8, article id 6456
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URN: urn:nbn:se:liu:diva-147929DOI: 10.1038/s41598-018-24761-wISI: 000430662200001PubMedID: 29691430OAI: oai:DiVA.org:liu-147929DiVA, id: diva2:1209549
Note

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

Available from: 2018-05-23 Created: 2018-05-23 Last updated: 2018-06-19

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