| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We studied the structural color of several butterflies and weevils species that utilize the photonic crystal structure for the coloration. In particular, the relation between the crystal orientation and the optical properties was investigated for the Emerald-patched Cattleheart butterfly. We found that the reflection from the photonic crystal domain largely changes depending on the crystal orientation and the polarization of the illuminating light. On the basis of the experimentally determined crystal orientation of the phonic crystal, polarization-dependent reflectance was theoretically calculated. From the agreement between the calculation and the observation, we concluded that the separated domains with different in-plane crystal orientations cause the tessellated pattern of the scale that is observed under a crossed polarizer and analyzer.
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