Lithography-free and Highly Angle Sensitive Structural Coloration Using Fabry–Perot Resonance of Tin

Abstract Recently, there has been much interest in applying the color changes of nano-patterned structures to sensor technology. However, lithographic nano-patterning process is not environmentally friendly, and it difficult fabricate large areas due limitations associated with this approach. In study, we realized a highly tunable structural coloration based on Fabry–Perot interferometer design that does require processes. To increase reflected change according angle, element using an asymmetric metal–insulator–metal structure was applied, fabricated silver–silicon dioxide–tin (Sn), respectively. Using optical properties Sn, maximized reflection three primary colors subtractive cyan, magenta yellow angle designed MIM structure. Theoretical experimental results revealed intensity reflectance depended strongly reflective surfaces. The manufacturing simple yields surfaces high quality. Based premise, soft robot capable camouflage, angle-detecting for inspecting three-dimensional shape quality curved glass sensitivity 1.8 nm/degree. addition, propose evaluation method by color, spectrometry, monochromatic light.