Morpho蝶翅结构色的线性液体反应

Linear Liquid Response of Morpho Butterfly Structural Color

通过研究Morpho蝶翅鳞片的液体敏感性,发现蝶翅鳞片表面的三维微纳精细结构是其耀眼蓝色光泽的首要原因:蝶翅鳞片浸润在不同液体介质中,会发生不同的光学反应。通过光学模型解释了不同介质成分对液体反应的影响:发生这种选择性反应的原因是液体介质在鳞片层脊间形成了多层纳米薄膜,导致通过多层薄膜而发生相长干涉的波长发生了变化。研究发现蝶翅层脊结构的结构色和其液体氛围折射率之间存在线性关系,天然结构液体氛围实验的结果、几种仿蝶翅模型仿真结果与多层薄膜干涉理论完全匹配,验证了这一线性关系。这一选择性线性液体反应可以被用来设计纳米光子传感器。

The paper investigates the selective liquid response of Morpho butterfly wing scales. The ridgelamellae structures on Morpho scales hold the secret of its famous blue structural color. The scales give different optical responses to different individual liquid media. Our optical model explains the effect of different components on the liquid response. It is found that the selective response is attributed to the liquid media formed nanometre-thick films between scales lamellae and changed the constructive interference wavelength. It is discovered that there was linear relation between the structural color of ridge-lamellae structure and index of liquid background media. This linearity was verified through experiment, simulation and optic theory. This selective linear liquid response could be applied to design nano-engineered photonic sensors.