Experimental investigation of multiple-particle pattern based on one-dimensional grating resonance field

Manipulation of particles by ultrasonic waves is a primary technique in the fields precision manufacturing, materials engineering, and vitro diagnosis, since it can control motion objects sound field contactless noninvasive manner. In general, free field, such as focused plane wave generated single transducer only manipulate particle. While complex array should be actuated electric system, which makes manipulation device expensive cumbersome. Thus, modulated acoustic for particle still needed. Here, we experimental realize one-dimensional grating to tune parallel pattern multiple particles. The physical mechanism that due resonance coupling between periodic diffraction on surface Fabry-Perot resonant slit, periodical gradient induced. Then, trapped two stable positions one period grating. These concepts realizations patterns pave way implementing technologies.