光学学报, 2019, 39 (1): 0126016, 网络出版: 2019-05-10
基于高效传输型超表面轨道角动量涡旋波束的产生 
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Generation of Orbital Angular Momentum Vortex Beams Based on High-Efficiency Transmission Metasurfaces
物理光学 涡旋波束 轨道角动量 拓扑荷数 超表面 physical optics vortex beam orbital angular momentum topological charge metasurface
摘要
应用高效传输型超表面,构造了一种可控相位的传输透镜,以标准角锥喇叭发出的准球面波照射,产生携带不同拓扑荷值的涡旋场波束。所用超表面在大于10%带宽范围内能实现大于90%的传输效率和进行3 bit以上的相位调制。通过补偿相位公式的理论推导,对超表面进行设计,得到30 GHz的高效率传输型超表面产生的携带轨道角动量(OAM)的高阶涡旋波束。利用全波仿真对所提出的方案进行验证,得到了与理论相符合的结果。
Abstract
The vortex beams carrying different topological values are generated based on the high efficiency transmission metasurfaces illuminated by quasi-spherical beams from standard horns. These metasurfaces are able to exhibit a transmission efficiency of over 90% in the bandwidth range of larger than 10% and an over 3-bit phase modulation. Through the theoretical derivation of a phase-compensation formula and the design of metasurfaces, high-order orbital angular momentum (OAM) vortex beams are generated on the high efficiency transmission metasurfaces at 30 GHz. The proposed scheme is verified by the full-wave simulation and the results agree well with the theoretical results.
刘凯婷, 刘鑫, 葛悦禾, 蒲继雄. 基于高效传输型超表面轨道角动量涡旋波束的产生[J]. 光学学报, 2019, 39(1): 0126016. Kaiting Liu, Xin Liu, Yuehe Ge, Jixiong Pu. Generation of Orbital Angular Momentum Vortex Beams Based on High-Efficiency Transmission Metasurfaces[J]. Acta Optica Sinica, 2019, 39(1): 0126016.
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