Light beams with orbital angular momentum for free space optics
武京治, 李仰军
Light beams with orbital angular momentum for free space optics
Wu Jing-Zhi(武京治) and Li Yang-Jun(李仰军)
中国物理B . 2007, (5): 1334 -1338 .  DOI: 10.1088/1009-1963/16/5/028