日本シミュレーション学会論文誌
Online ISSN : 1883-5058
Print ISSN : 1883-5031
ISSN-L : 1883-5058
論文
非理想的な多層構造を持つ多層誘電体格子による構造性発色の数値解析
丸山 岳人若林 秀昭荒井 剛稲井 寛
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2020 年 12 巻 2 号 p. 68-75

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This paper investigates structural coloration by a multilayered dielectric grating with non-ideal multilayers where the optical thickness of two media differ greatly. We formulate the matrix eigenvalues method to analyze the three-dimensional scattering problem of the structure for an unpolarized light incidence. Getting the specularly reflected diffraction efficiencies and transforming the efficiencies into the chromatic coordinates in standard RGB (sRGB) color space and the chromaticity coordinates, we numerically study the structural coloration. From the numerical results, we obtain the following characteristics of the structural coloration by the structure. The coloration requires a large number of layers to enforce interference reflection, vivid high-saturation structural coloration with a narrow reflection peak can be obtained, and periodic structure has a small effect on the structural coloration.

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