当前位置：
X-MOL 学术
›
Adv. Opt. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Airy Beam Generation: Approaching Ideal Efficiency and Ultra Wideband with Reflective and Transmissive Metasurfaces
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-08-23 , DOI: 10.1002/adom.202000860 Wen‐Long Guo 1, 2 , Ke Chen 1 , Guang‐Ming Wang 2 , Xin‐Yao Luo 1 , Tong Cai 2 , Chi‐Ben Zhang 2 , Yijun Feng 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-08-23 , DOI: 10.1002/adom.202000860 Wen‐Long Guo 1, 2 , Ke Chen 1 , Guang‐Ming Wang 2 , Xin‐Yao Luo 1 , Tong Cai 2 , Chi‐Ben Zhang 2 , Yijun Feng 1
Affiliation
|
Airy beams are essential for photonic applications, owing to their intriguing diffraction‐free, self‐accelerating, and self‐healing properties. Recently, 2D metasurfaces have offered great opportunities for generating Airy beams within subwavelength thickness. However, they suffer from the bottlenecks of low efficiency and narrow bandwidth, which may limit their applications in practice. In this study, a strategy is proposed to design amplitude‐ and phase‐controllable metasurfaces that can generate desirable high‐efficiency and ultra wideband Airy beams, based on the Jones matrix analysis. Two exemplary prototypes of Airy beam generators operating in reflection and transmission geometries are demonstrated in the microwave region, achieving high efficiency approaching the theoretical limitation in an ultrawide bandwidth (fractal bandwidth of 84% for reflective prototype and 118% for transmissive). The results show a significant advantage of the bandwidth and total efficiency over low‐thickness metasurfaces. The proposed strategy and metasurface generators may trigger great interest in ultra wideband and high‐efficiency wave manipulations, with small thickness and flat profile compatible with integrated systems, which hold promise for structured light, metaoptics, beam shaping, and advanced holography.
中文翻译：
通风光束的产生：通过反射和透射超表面接近理想效率和超宽带
通风光束具有无衍射，自加速和自修复的特性，因此对于光子应用至关重要。最近，二维超表面为在亚波长厚度范围内产生艾里光束提供了巨大的机会。但是，它们存在效率低和带宽窄的瓶颈，这可能会限制其在实践中的应用。在这项研究中，基于Jones矩阵分析，提出了一种策略，可设计振幅和相位可控的超表面，以产生理想的高效和超宽带艾里光束。在微波区域展示了在反射和透射几何中运行的两个Airy光束发生器的示例性原型，在超宽带宽（反射原型的分形带宽为84％，透射型的分形带宽为118％）中达到接近理论极限的高效率。结果表明，与低厚度的超颖表面相比，带宽和总效率具有显着优势。提出的策略和超表面波发生器可能会引起人们对超宽带和高效率波操作的极大兴趣，它们具有与集成系统兼容的小厚度和扁平轮廓，为结构化光，超光学，光束整形和高级全息术提供了希望。
更新日期：2020-08-23
中文翻译：
通风光束的产生：通过反射和透射超表面接近理想效率和超宽带
通风光束具有无衍射，自加速和自修复的特性，因此对于光子应用至关重要。最近，二维超表面为在亚波长厚度范围内产生艾里光束提供了巨大的机会。但是，它们存在效率低和带宽窄的瓶颈，这可能会限制其在实践中的应用。在这项研究中，基于Jones矩阵分析，提出了一种策略，可设计振幅和相位可控的超表面，以产生理想的高效和超宽带艾里光束。在微波区域展示了在反射和透射几何中运行的两个Airy光束发生器的示例性原型，在超宽带宽（反射原型的分形带宽为84％，透射型的分形带宽为118％）中达到接近理论极限的高效率。结果表明，与低厚度的超颖表面相比，带宽和总效率具有显着优势。提出的策略和超表面波发生器可能会引起人们对超宽带和高效率波操作的极大兴趣，它们具有与集成系统兼容的小厚度和扁平轮廓，为结构化光，超光学，光束整形和高级全息术提供了希望。
京公网安备 11010802027423号