Chirality-induced polarization effects in the cuticle of scarab beetles: 100 years after Michelson
2012 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 92, no 12, 1583-1599 p.Article in journal (Refereed) Published
One hundred years ago Michelson discovered circular polarization in reflection from beetles. Today a novel Mueller-matrix ellipsometry setup allows unprecedented detailed characterization of the beetles polarization properties. A formalism based on elliptical polarization for description of reflection from scarab beetles is here proposed and examples are given on four beetles of different character: Coptomia laevis - a simple dielectric mirror; Cetonia aurata - a left-hand narrow- band elliptical polarizer; Anoplognathus aureus - a broad-band elliptical polarizer; and Chrysina argenteola - a left-hand polarizer for visible light at small angles, whereas for larger angles, red reflected light is right-handed polarized. We confirm the conclusion of previous studies which showed that a detailed quantification of ellipticity and degree of polarization of cuticle reflection can be performed instead of only determining whether reflections are circularly polarized or not. We additionally investigate reflection as a function of incidence angle. This provides much richer information for understanding the behaviour of beetles and for structural analysis.
Place, publisher, year, edition, pages
Taylor and Francis: STM, Behavioural Science and Public Health Titles / Taylor and Francis , 2012. Vol. 92, no 12, 1583-1599 p.
scarab beetles, Mueller-matrix ellipsometry, elliptical polarization, structural colours
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-77876DOI: 10.1080/14786435.2011.648228ISI: 000303578700008OAI: oai:DiVA.org:liu-77876DiVA: diva2:529680
Funding Agencies|Knut and Alice Wallenberg foundation||Swedish Research Council||2012-05-312012-05-312015-09-22