本論文主要是探討自然界中的Papilio blumei(P. blumei)蝴蝶，因為其翅膀上及尾翼部分具有綠色及青色的鱗片，而鱗片上的顏色主要是由幾丁質及空氣共同組成特殊的凹洞多層膜孔洞結構，而此凹洞結構具有偏極轉化的光學特性，本文利用有限時域差分法(Finite-Difference Time-Domain, FDTD)模擬蝴蝶鱗片結構及利用聚苯乙烯小球(polystyrene spheres)、感應耦合電漿離子蝕刻技術(Inductively coupled plasma etching)及雙電子槍蒸鍍系統等方法仿造其蝴蝶鱗片結構。 首先，多層膜結構由幾丁質及幾丁質/空氣層幾丁質所組成，而兩種顏色的層數、幾丁層及空氣層厚度以及有幾丁質/空氣層比例皆不同，故使用有限時域差分法模擬不同參數下的蝴蝶多層膜孔洞結構，探討其顏色趨勢，並利用等效介質理論模擬其凹洞結構，探討其凹洞結構中央與四周的顏色分布。 在製程過程中，利用聚苯乙烯小球、感應耦合電漿離子蝕刻技術製作鱗片凹洞結構，再利用雙電子槍蒸鍍系統鍍製Ta2O5、SiO2兩種材料仿造其多層膜結構等，以達到仿造其蝴蝶鱗片凹洞結構及其偏極轉化(polarization rotation)的光學特性。The scales on wings of Papilio blumei (P. blumei) butterflies have been investigated and discussed in this article. There are two scales with green stripe across its forewings and hindwings and a blue color from the tail region of its hindwings. The scales are constituted of chitin-air concavities structures. The concavities structure makes polarization rotation and color mixing. We utilized Finite-Difference Time-Domain, FDTD, method to simulate the structures of scales and fabricated the concavities structures with polystyrene spheres, inductively coupled plasma etching (ICP etching) and electron beam gun evaporation. The parameters of layers, chitin depth, chitin length, air depth and length differ from the two scales determinate the color in the green and cyan regions. Utilizing FDTD method to simulate the different parameters, we have found a color changing trend from the spectra. Besides, we also simulated the concavities structures with effective medium approximation (EMA) to investigate the color on the center and side regions. We have used polystyrene spheres, inductively coupled plasma etching to mimic the concavities structure and Ta2O5/SiO2 multilayers by electron beam gun evaporation to fabricate the structure and analyze the polarization rotation and color appearance.
