Wang Jingang, Bu Jing, Wang Mingwei, Yang Yong, Yuan Xiaocong
Institute of Modern Optics, Key Laboratory of Optical Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, China.
Appl Opt. 2011 Dec 20;50(36):6627-31. doi: 10.1364/AO.50.006627.
We design and fabricate a hybrid refractive-diffractive cubic phase plate (CPP) with a combined conventional blazed grating for generating high quality Airy beams. The grating enables elimination of direct incident illumination in the reconstructed beam. The CPP is fabricated in a negative photoresist on a substrate by laser direct writing lithography with precise exposure control of gray scales. Experimentally measured intensity distribution of the Airy beam is found in good agreement with the theoretical predictions. Furthermore, self-healing and nondiffraction properties of the Airy beam are verified experimentally. The proposed method gives rise to a simple, reliable, and low-cost micro-optical element solution for the generation of high quality Airy beams.
我们设计并制造了一种混合折射-衍射立方相位板（CPP），其结合了传统闪耀光栅，用于产生高质量的艾里光束。该光栅能够消除重构光束中的直接入射照明。通过激光直写光刻技术在衬底上的负性光刻胶中制造CPP，并对灰度进行精确曝光控制。实验测量得到的艾里光束强度分布与理论预测结果吻合良好。此外，还通过实验验证了艾里光束的自愈合和无衍射特性。所提出的方法为产生高质量艾里光束提供了一种简单、可靠且低成本的微光学元件解决方案。
