For a long time, human beings have been yearning for free regulation of light waves. But it is limited by poor performances of the natural materials. The emergence of two-dimensional(2D) synthetic nanomaterials greatly promotes the developments of light control technologies, which has dramatically improved the ability of human beings to control light. People can realize flexible regulation of the propagation speed or propagation direction of light wave in material, optical response and frequency, polarization state of light wave based on a series of novel photoelectric properties of 2D synthetic nanomaterials. So, 2D nanomaterials enabled light control technologies have become a research hotspot in recent years. In this review, we summarize the various technologies realized by 2D materials and introduce the related applications. We further analyze, compare these technologies. This review is aimed to give a generalized knowledge of 2D nano-materials-enabled smart light regulation technologies and their current devices applications, and thus inspiring the exploration and development of other kinds of new light regulation devices and various novel applications. The challenges and the prospects of the future, especially the application of artificial intelligence (AI) in research and development of 2D materials, are also given.

In this letter, we describe the operation of an end-pumped acousto-optic Q-switched Nd:YLF laser. According to the theoretical analysis and calculation for Nd:YLF crystal, the thermal focal length of σ-polarized laser is positive in plane-parallel resonator, while that of π-polarized laser is negative. Hence laser operation at σ-polarized 1313 nm should be stable in plane-parallel cavity. When absorbed pump power is 12.45 W and the pulse repetition frequency is 10 kHz, 3.1 W output laser at 1313 nm is achieved. As a result, the optical–optical conversion efficiency is 25.4 % and slope efficiency is 31.2 %, respectively.

液晶光栅作为一种光学相控阵被应用在激光雷达、卫星通信等系统中，可以实现激光束的灵活偏转。而要对定向光束的质量进行控制，必须对液晶光栅相控阵的波前进行测试，仿真结果可为液晶光栅性能的评价及波前测试提供参考。

液晶光栅加电后形成的相位轮廓是二元台阶形状。为测试液晶光栅的相位轮廓以保证液晶光栅的工作性能，采用闪耀级次(+1级)的近场衍射光场逆衍射计算方法并运用 Matlab 仿真来反演出液晶光栅的相位轮廓，提出了基于菲涅尔逆衍射的反演液晶光栅相位轮廓方法。衍射光场逆衍射反演得到的相位轮廓与模拟实际应用中的二元光栅相位轮廓的差值均方差精度验证了液晶光栅衍射光场逆衍射计算方法切实可行、准确。该方法不仅可以用来测试液晶光栅的相位轮廓，在液晶光栅工作性能下降时，也可作为分析、调试液晶光栅相位轮廓的一个非常有用的工具。