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Fabrication of two kinds of eight-fold photonic quasi-crystals assisted by a specially designed prism

机译：特殊设计的棱镜辅助制作两种八倍的光子准晶体

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摘要

We demonstrate that two kinds of 2D eight-fold photonic quasi-crystals (PQCs) can be fabricated by a specially designed prism via single-exposure holographic lithography. The prism with five continuous side surfaces out of common eight symmetrical side surfaces, plus a top surface, is well designed for PQC fabrication. Compared with the traditional method of setting up eight free-space beams in the half-space for an eight-fold PQC fabrication, our specially designed prism reduces the number of beams, avoids the differences of beam-to-beam phases, and simplifies the fabrication process. The theory and computer simulation confirm the patterns of two kinds of PQCs by a single prism illumination recording. Further, these quasi-crystal patterns are successfully verified by experimental results under a scanning electron microscope. In addition, these samples show some good properties, such as uniformity over large area, the implementation of a single defect by underexposure, and symmetry break of the eight dots. Our special prism-assisted holographic lithography technique provides a base for further investigating the optical properties of these novel structures.
机译：我们证明了一种2D八重光子准晶体（PQCs）可以由特殊设计的棱镜通过单次曝光全息照相平版印刷来制造。棱镜在常见的八个对称侧面中加上五个连续侧面，再加上一个顶面，是为PQC制造精心设计的。与传统的在八分之一的PQC制造中在半空间中设置八个自由空间光束的方法相比，我们特别设计的棱镜减少了光束的数量，避免了光束与光束的相位差，并简化了光束。制造过程。理论和计算机仿真通过单棱镜照明记录确定了两种PQC的模式。此外，在扫描电子显微镜下通过实验结果成功地验证了这些准晶体图案。另外，这些样品显示出一些良好的性能，例如大面积上的均匀性，通过曝光不足实现单个缺陷以及八个点的对称断裂。我们特殊的棱镜辅助全息光刻技术为进一步研究这些新颖结构的光学特性提供了基础。

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