Ultranegative angular dispersion of diffraction in quasiordered biophotonic structures.
Ultranegative angular dispersion of diffraction in quasiordered biophotonic structures.
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DOI：
10.1364/oe.19.007750
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发表时间：
2011-04
期刊：
影响因子：
3.8
通讯作者：
Feng Liu;B. Dong;F. Zhao;Xinhua Hu;Xiaohan Liu;J. Zi
中科院分区：
文献类型：
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作者：
Feng Liu;B. Dong;F. Zhao;Xinhua Hu;Xiaohan Liu;J. Zi
我们报告说，在甲虫 H. sexmaculata 的角质层中发现的三维准有序光子结构可以以“错误”的方式衍射光，并且其角色散比传统衍射光栅大大约一个数量级。人们发现一种新的光子带隙衍射类型（来自纵向和横向模式的反交叉）和额外的无序效应在这种现象中发挥着重要作用。模仿这种结构可能会产生具有超大角色散的新型光学器件。
We report that a three-dimensional quasiordered photonic structure, found in the cuticles of beetle H. sexmaculata, can diffract light in a "wrong" way and its angular dispersion is about one order of magnitude larger than that of a conventional diffraction grating. A new diffraction type of photonic bandgap (from an anticrossing of longitudinal and transverse modes) and additional disorder effect are found to play important roles in this phenomenon. Mimicking the structure could lead to novel optical devices with ultralarge angular dispersion.