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Generating Focused 3D Perfect Vortex Beams By Plasmonic Metasurfaces
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-01-04 , DOI: 10.1002/adom.201701228 Yuchao Zhang 1 , Weiwei Liu 1 , Jie Gao 1 , Xiaodong Yang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-01-04 , DOI: 10.1002/adom.201701228 Yuchao Zhang 1 , Weiwei Liu 1 , Jie Gao 1 , Xiaodong Yang 1
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Perfect vortex (PV) beams possessing annular intensity profiles independent of topological charges promise significant advances in particle manipulation, fiber communication, and quantum optics. The PV beam is typically generated from the Fourier transformation of the Bessel–Gauss beam. However, the conventional method to produce PV beams requires a series of bulky optical components, which greatly increases the system complexity and also hinders the photonic device integration. Here, plasmonic metasurfaces made of rectangular‐hole nanoantennas as integrated beam converters are designed and demonstrated to generate focused 3D PV beams in a broad wavelength range, by combining the phase profiles of axicon, spiral phase plate, and Fourier transform lens simultaneously based on the Pancharatnam–Berry phase. It is demonstrated that the PV beam structures can be adjusted by varying several control parameters in the metasurface design. Moreover, multiple PV beams with arbitrary arrangement and topological charges are also produced. These results have the promising potential for enabling new types of compact optical devices for tailoring complex light beams and advancing metasurface‐based functional integrated photonic chips.
中文翻译：
通过等离振子超表面产生聚焦的3D完美涡旋光束
具有环形强度分布且与拓扑电荷无关的完美涡旋（PV）光束有望在粒子处理，光纤通信和量子光学方面取得重大进展。PV光束通常是由Bessel-Gauss光束的傅立叶变换产生的。然而，产生PV光束的常规方法需要一系列笨重的光学组件，这大大增加了系统的复杂性，也阻碍了光子器件的集成。在这里，设计并演示了由矩形孔纳米天线作为集成光束转换器的等离子超表面，该技术通过同时结合轴锥棱镜，螺旋相位板和傅立叶变换透镜的相位分布，生成宽波长范围内的聚焦3D PV光束。 Pancharatnam–Berry相。结果表明，可以通过改变超表面设计中的几个控制参数来调节PV梁的结构。而且，还产生具有任意布置和拓扑电荷的多个PV束。这些结果具有潜力，使新型紧凑型光学设备能够定制复杂的光束并推进基于超表面的功能性集成光子芯片。
更新日期：2018-01-04
中文翻译：
通过等离振子超表面产生聚焦的3D完美涡旋光束
具有环形强度分布且与拓扑电荷无关的完美涡旋（PV）光束有望在粒子处理，光纤通信和量子光学方面取得重大进展。PV光束通常是由Bessel-Gauss光束的傅立叶变换产生的。然而，产生PV光束的常规方法需要一系列笨重的光学组件，这大大增加了系统的复杂性，也阻碍了光子器件的集成。在这里，设计并演示了由矩形孔纳米天线作为集成光束转换器的等离子超表面，该技术通过同时结合轴锥棱镜，螺旋相位板和傅立叶变换透镜的相位分布，生成宽波长范围内的聚焦3D PV光束。 Pancharatnam–Berry相。结果表明，可以通过改变超表面设计中的几个控制参数来调节PV梁的结构。而且，还产生具有任意布置和拓扑电荷的多个PV束。这些结果具有潜力，使新型紧凑型光学设备能够定制复杂的光束并推进基于超表面的功能性集成光子芯片。
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