England Grant, Kolle Mathias, Kim Philseok, Khan Mughees, Muñoz Philip, Mazur Eric, Aizenberg Joanna
School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138;
School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139; and
Proc Natl Acad Sci U S A. 2014 Nov 4;111(44):15630-4. doi: 10.1073/pnas.1412240111. Epub 2014 Oct 6.
Recently, diffraction elements that reverse the color sequence normally observed in planar diffraction gratings have been found in the wing scales of the butterfly Pierella luna. Here, we describe the creation of an artificial photonic material mimicking this reverse color-order diffraction effect. The bioinspired system consists of ordered arrays of vertically oriented microdiffraction gratings. We present a detailed analysis and modeling of the coupling of diffraction resulting from individual structural components and demonstrate its strong dependence on the orientation of the individual miniature gratings. This photonic material could provide a basis for novel developments in biosensing, anticounterfeiting, and efficient light management in photovoltaic systems and light-emitting diodes.
最近，在月神闪蝶（Pierella luna）的翅鳞中发现了一些衍射元件，这些元件能够反转在平面衍射光栅中通常观察到的颜色顺序。在此，我们描述了一种模仿这种反向颜色顺序衍射效应的人造光子材料的制备。这种受生物启发的系统由垂直取向的微衍射光栅的有序阵列组成。我们对各个结构组件产生的衍射耦合进行了详细分析和建模，并证明了其对各个微型光栅取向的强烈依赖性。这种光子材料可为生物传感、防伪以及光伏系统和发光二极管中的高效光管理等新发展提供基础。
