Vukusic Pete, Hooper Ian
School of Physics, Exeter University, Exeter EX4 4QL, UK.
Science. 2005 Nov 18;310(5751):1151. doi: 10.1126/science.1116612.
Recently developed, high-efficiency, light-emitting diodes use two-dimensional photonic crystals to enhance the extraction of otherwise internally trapped light and multilayer reflectors to control the direction of light emission. This work describes the characterization of a naturally evolved light-extraction system on the wing scales of a small group of Papilio butterflies. The efficient extraction of fluorescence from these scales is facilitated by a two-dimensional photonic crystal slab that uses a multilayer to help control emission direction. Its light-extraction function is analogous to that of the light-emitting diode.
最近研发的高效发光二极管利用二维光子晶体来增强原本被困在内部的光的提取，并利用多层反射器来控制光的发射方向。这项工作描述了一小群凤蝶翅膀鳞片上自然演化出的光提取系统的特性。这些鳞片中荧光的高效提取是由一个二维光子晶体平板促成的，该平板利用多层结构来帮助控制发射方向。其光提取功能类似于发光二极管。
