Generation of Spin‐Dependent Accelerating Beam with Geometric Metasurface,Advanced Optical Materials

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Generation of Spin‐Dependent Accelerating Beam with Geometric Metasurface
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2019-05-17 , DOI: 10.1002/adom.201900552
Haoyu Wang ₁ , Jing Du ₁ , Han Wang ₁ , Yonghua Lu _{1,

2} , Pei Wang _{1,

2}

Affiliation

Airy beam holds great promise for wide applications because of its unique features of being diffraction‐free, self‐accelerating, and self‐healing. Much efforts are devoted to develop concise and efficient methods to generate and manipulate accelerating Airy beams. In this paper, a novel method is proposed to generate single or paired Airy beams by encoding the geometric phase of dielectric metasurface. Cubic phase, together with a linearly gradient phase, is imposed on the metasurface to control the acceleration and initial launching velocity of accelerating Airy beams. Spin‐dependent geometric phase facilitates the generation of spin‐dependent Airy beams by simply controlling the polarization of incident light. High quality of the generated Airy beam is testified by characterization of its diffraction‐free, self‐accelerating, and self‐healing propagation. Despite the loss for silicon in visible region, generation efficiency as high as 63% is achieved for the metasurface Airy beam generator. The results demonstrate the possibility to manipulate complex structured optical field with all‐dielectric metasurface and broaden the potential application of Airy beams into compact and integrated systems.

中文翻译：

具有几何超表面的自旋相关加速梁的生成

通风光束因其无衍射，自加速和自修复的独特功能而在广泛的应用领域具有广阔的前景。致力于开发简洁高效的方法来生成和操纵加速的艾里光束。在本文中，提出了一种通过对介电超表面的几何相位进行编码来生成单个或成对的艾里光束的新方法。三次相与线性梯度相一起施加在超表面上，以控制加速的艾里光束的加速度和初始发射速度。依赖自旋的几何相位可通过简单地控制入射光的偏振来促进依赖自旋的艾里光束的产生。无衍射，自加速，和自我修复的传播。尽管在可见光区域损失了硅，但超表面艾里光束发生器的发电效率仍可达到63％。结果表明，可以操纵具有全介电超表面的复杂结构光场，并将艾里光束的潜在应用扩展到紧凑且集成的系统中。

更新日期：2019-05-17

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