Multiple off-axis acoustic vortices generated by dual coaxial vortex beams
Li Wen1, Dai Si-Jie2, Ma Qing-Yu1, †, Guo Ge-Pu1, Ding He-Ping1
       

(color online) Cross-sectional distributions of pressure and phase of off-axis AVs at z = 20 cm for the coaxial AV beams with ((a) and (b)) and , ((c) and (d)) and , and ((e) and (f)) and .