Fine structures of wing scales in Sasakia charonda butterflies as photonic crystals
Fine structures of wing scales in Sasakia charonda butterflies as photonic crystals
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DOI：
10.1111/j.1365-2818.2009.03233.x
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发表时间：
2009-11-01
影响因子：
2
通讯作者：
Shiojiri, M.
中科院分区：
文献类型：
--
作者：
Matejkova-Plskova, J.;Shiojiri, S.;Shiojiri, M.
利用扫描电子显微镜和光学显微镜研究了雄蝶翅鳞的显微结构。鳞片有6种类型：B1、W1和R1分别为棕色背景的黄色斑点和红色斑点; B2为彩虹色的紫蓝色，W2为白色珍珠色，这两种鳞片都是雄性的特征; B3为翅缘的鳞片。B1、W1和R1尺度在结构上几乎相同，B2和W2尺度几乎相同。B、W、R三个等级之间的差异在于色素的种类和含量。B_1、W_1和R_1鳞片只有两层角质层，重叠在脊上。与此相反，B2和W2鳞片有七层角质层堆积在脊上。在这些角质层之间发生的光的多重干涉，与空气层隔开，产生了B2和W2尺度的显着彩虹色。因此，雄性翅膀的特征性紫蓝色归因于B2鳞片中的结构和化学着色与黑色素的结合。这些尺度的光子晶体可以应用于精细的光操纵器，例如激光二极管中的反射元件。B3脊之间有许多孔，脊上没有多层角质层。这些结构可以在空气动力学上容易的飞行和/或湿翼的排水中起任何作用。
P>We investigate the microstructure of scales in the wings of male Sasakia charonda charonda butterflies by scanning electron microscopy with the aid of optical microscopy. Six types of scales are identified: B1, W1 and R1 in brown background yellow spots and red spots, respectively; B2 in iridescent purple-blue and W2 in white pearl, both of which characterize the male and B3 in the wing edges. The B1, W1 and R1 scales are almost the same in structure and the B2 and W2 scales are almost the same. The difference among the B, W and R scales is in species and content of pigment. The B1, W1 and R1 scales have only two layers of cuticle lapped on the ridges. In contrast with them, the B2 and W2 scales have seven multilayers of cuticle piled on the ridge. The multiple interference of light that occurs among these cuticle layers, spaced with air layers, generates the significant iridescence of the B2 and W2 scales. Thus, the characteristic purple-blue of the male wings is ascribed to the combination of the structural and chemical colouration in the B2 scales with melanin. The photonic crystals of these scales may be applicable to fine light manipulators such as reflection elements in laser diodes. B3 has many holes between the ridges and no multilayers of cuticle on the ridges. These structures may play any role in aerodynamically easy flight and/or in drainage of wet wings.