10.6084/m9.figshare.7326923.v1 Yijie Shen Yijie Shen V2-SHEN-02.mp4 Optica Publishing Group 2019 Physical Optics 2019-03-13 14:26:28 Media https://opticapublishing.figshare.com/articles/media/V2-SHEN-02_mp4/7326923 video illustration of SHEN spheres for (n, m) = (0, 2)