Broadband acoustic focusing by symmetric Airy beams with phased arrays comprised of different numbers of cavity structures
Qian Jiao1, Liu Bo-Yang1, Sun Hong-Xiang1, 2, †, Yuan Shou-Qi1, ‡, Yu Xiao-Zhu1
       

(color online) (a) Theoretical continuous (blue line) and discrete phase delays (red hollow dots) provided by six types of units in Fig. 2(c) (blue hollow dots) for Airy beam. Spatial distributions of acoustic intensity field |p|2 for Airy beam by using (b) theoretical continuous phase delays and (c) discrete phase array at 7.95 kHz.