Chirality-induced polarization effects in the cuticle of scarab beetles: 100 years after Michelson
Chirality-induced polarization effects in the cuticle of scarab beetles: 100 years after Michelson
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DOI：
10.1080/14786435.2011.648228
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发表时间：
2012-01-01
影响因子：
1.6
通讯作者：
Jarrendahl, Kenneth
中科院分区：
文献类型：
--
作者：
Arwin, Hans;Magnusson, Roger;Jarrendahl, Kenneth
一百年前，迈克尔逊发现了甲虫反射的圆偏振。今天，一种新颖的米勒矩阵椭圆偏振仪装置允许对甲虫的偏振特性进行前所未有的详细表征。本文提出了一种描述金龟子反射的椭圆偏振形式，并给出了四种不同性质的金龟子反射的例子：Coptomia laevis --一种简单的介质镜，Cetonia aurata --一种左旋窄带椭圆偏振器，Anoplognathus aureus --一种宽带椭圆偏振器，Cetonia aurata --一种左旋窄带椭圆偏振器，Cetonia aurata--一种左旋窄带椭圆偏振器。和Argenteola -用于小角度可见光的左旋偏振器，而对于较大角度，红色反射光是右旋偏振的。我们证实了以前的研究表明，可以进行详细的量化的椭圆率和角质层反射的偏振度，而不是只确定反射是否是圆偏振或不的结论。我们还调查了反射作为入射角的函数。这为了解甲虫的行为和结构分析提供了更丰富的信息。
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.