Yang X L, Cai L Z, Wang Y R, Dong G Y, Shen X X, Meng X F, Hu Y
Department of Optics, Shandong University, Jinan 250100, People's Republic of China.
Nanotechnology. 2008 Jan 16;19(2):025201. doi: 10.1088/0957-4484/19/02/025201. Epub 2007 Dec 6.
It is well known that the square lattice of isolated single-atom dielectric rods in air does not give rise to complete bandgaps even when asymmetry is introduced to lift some degeneracy. However, in this paper, a new kind of two-dimensional square photonic crystal with isolated single-atom dielectric rods in air formed by holographic lithography is proposed, and the relation between their photonic bandgap properties and their specific holographic design are systematically analyzed. In addition to the large complete relative bandgap, namely 9.68% gap/midgap ratio for the dielectric constant contrast of 13.6:1, this structure has very large tolerance on the system parameters and fabrication conditions. This fact can greatly relax the experimental requirements. This work may demonstrate the unique feature and advantages of photonic crystals made by the holographic method and provide a guideline for their design and fabrication.
众所周知，即使引入不对称性以消除某些简并性，空气中孤立单原子介质棒的方形晶格也不会产生完全带隙。然而，本文提出了一种通过全息光刻形成的空气中具有孤立单原子介质棒的新型二维方形光子晶体，并系统地分析了它们的光子带隙特性与其特定全息设计之间的关系。除了具有大的完全相对带隙，即介电常数对比度为13.6:1时带隙/中隙比为9.68%之外，这种结构对系统参数和制造条件具有非常大的容差。这一事实可以大大放宽实验要求。这项工作可能展示了通过全息方法制造的光子晶体的独特特征和优势，并为其设计和制造提供指导。
