Analysis of optical properties of the porous colloid photonic structure by the finite element method

2014 Fiscal Year Final Research Report

• Project/Area Number: 23540436
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Jikei University School of Medicine
• Principal Investigator: UETA Tsuyoshi 東京慈恵会医科大学, 医学部, 教授 (30251185)
• Co-Investigator(Kenkyū-buntansha): FUJII Garuda 信州大学, 工学部, 助教 (90569344)
• Research Collaborator: MORIMOTO Gen ; MIYAMOTO Kiyoshi ; KOSAKU Akinori
• Project Period (FY): 2011-04-28 – 2015-03-31
• 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

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.

Free Research Field

計算物理学