@article{Zhang2019, author = "Bin Zhang and Muyu Yi and Zheqiang Zhong", title = "{Spiral phase.gif}", year = "2019", month = "12", url = "https://opticapublishing.figshare.com/articles/media/Spiral_phase_gif/11292221", doi = "10.6084/m9.figshare.11292221.v1" }