| Project/Area Number |
23540436
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Jikei University School of Medicine |
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Principal Investigator |
UETA Tsuyoshi 東京慈恵会医科大学, 医学部, 教授 (30251185)
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| Co-Investigator(Kenkyū-buntansha) |
FUJII Garuda 信州大学, 工学部, 助教 (90569344)
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| Research Collaborator |
MORIMOTO Gen
MIYAMOTO Kiyoshi
KOSAKU Akinori
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ランダム系 / 構造色 / フォトニック・アモルファス / ポーラス構造 / 有限要素法 / ランダムレーザー / 反射スペクトル / ルリビタキ / カワセミ / 羽枝 / ランダムポーラス構造 / 有限要素法解析 / 泡モデル / ポーラスフォトニック結晶 / 電磁波 / コロイド |
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| Outline of Final Research Achievements |
It has been observationally confirmed that the color of birds, such as kingfisher and red-flanked bluetail, is a structural color owing to the interference of the light within a sponge structure inside a barb. In this study, we proposed the disordered air rod photonic crystal as a model of the structural color of the feather of blue birds, and computed the reflection properties. It was found that the reflection spectra are broadened more at higher frequency due to disorder of the lattice of the photonic crystal. The blue structural color is attributed to the reflection by the first photonic band gap of the disordered porous photonic crystal.This study also presents full modeling of the cross-section of blue feather barbs of Tarsiger cyanurus and computed optical properties of the barbs of Tarsiger cyanurus by means of finite element simulations.
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