Journal of the Vacuum Society of Japan
Online ISSN : 1882-4749
Print ISSN : 1882-2398
ISSN-L : 1882-2398
齋藤 彰宮村 友輔石川 陽子村瀬 淳一赤井 恵桑原 裕司
ジャーナル フリー

2009 年 52 巻 4 号 p. 218-223


  Conspicuous metallic blue of Morpho butterflies is well known and attract interest because it is a brilliant luster of natural beings. The blue is produced by their proteins, which are almost transparent without pigment. The origin of the coloration with high reflectivity (>~60%) is then attributed to an interference effect based on a periodic structure. However, the interference contradicts the blue that is maintained in too wide angular range (>±40° from the normal). This mystery has recently been explained with a specific multilayer, which is a fine combination of regular and random structures at nanometer scale. We proved this hypothesis successfully by emulating the 3D structures by deposition of multilayer film on a nano-patterned substrate. Such artificial structural color can be applied to various industries, because it makes colors qualitatively impossible by pigment, and resistant to fading due to chemical change over longtime. Also we developed a high throughput nano-patterning process by use of nano-imprinting method, and succeeded in controlling the optical properties both in angular and wavelength distribution.

© 2009 一般社団法人日本真空学会
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