Harb Ahmad, Torres Faraon, Ohlinger Kris, Lin Yuankun, Lozano Karen, Xu Di, Chen Kevin P
Department of Physics and Geology, University of Texas-Pan American, Edinburg, Texas 78541, USA.
Opt Express. 2010 Sep 13;18(19):20512-7. doi: 10.1364/OE.18.020512.
Large-area three-dimensional Penrose-type photonic quasicrystals are fabricated through a holographic lithography method using a lab-made diffractive optical element and a single laser exposure. The diffractive optical element consists of five polymer gratings symmetrically orientated around a central opening. The fabricated Penrose-type photonic quasicrystal shows ten-fold rotational symmetry. The Laue diffraction pattern from the photonic quasi-crystal is observed to be similar to that of the traditional alloy quasi-crystal. A golden ratio of 1.618 is also observed for the radii of diffraction rings, which has not been observed before in artificial photonic quasicrystals.
通过使用实验室自制的衍射光学元件和单次激光曝光的全息光刻方法，制备出大面积三维彭罗斯型光子准晶体。该衍射光学元件由围绕中心开口对称排列的五个聚合物光栅组成。制备出的彭罗斯型光子准晶体呈现出十重旋转对称性。观察到该光子准晶体的劳厄衍射图案与传统合金准晶体的相似。还观察到衍射环半径的黄金比例为1.618，这在人工光子准晶体中此前尚未被观察到。
