Identifying the orbital angular momentum of light based on atomic ensemblesLiang Han, Mingtao Cao, Ruifeng Liu, Hao Liu, Wenge Guo, Dong Wei, Shaoyan Gao, Pei Zhang, Hong Gao and Fuli LiEPL, 99 3 (2012) 34003DOI: https://doi.org/10.1209/0295-5075/99/34003
