State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu 610209, China.
Nanoscale. 2018 Jan 3;10(2):666-671. doi: 10.1039/c7nr07873k.
The quasi-Talbot effect of orbital angular momentum (OAM) beams, in which the centers are placed in a rotationally symmetric position, is demonstrated both numerically and experimentally for the first time. Since its multiplication factor is much higher than the conventional fractional Talbot effect, the quasi-Talbot effect can be used in the generation of vortex beam arrays. A metasurface based on this theory was designed and fabricated to test the validity of this assumption. The agreement between the numerical and measured results suggests the practicability of this method to realize vortex beam arrays with high integrated levels, which can open a new door to achieve various potential uses related to optical vortex arrays in integrated optical systems for wide-ranging applications.
首次在数值和实验上展示了轨道角动量（OAM）光束的类泰伯效应，其中光束中心处于旋转对称位置。由于其倍增因子远高于传统分数泰伯效应，因此类泰伯效应可用于产生涡旋光束阵列。基于该理论设计并制作了一个超表面来验证这一假设的有效性。数值和测量结果之间的一致性表明了这种方法实现高集成度涡旋光束阵列的实用性，这为在集成光学系统中实现与光学涡旋阵列相关的各种潜在应用开辟了新的途径。
