Self assembly of particles using phononic crystal slabs

By numerically studying the acoustic radiation forces on particle above the phononic crystal slabs (PCS), we show that a guided resonant mode of PCS yields a resonantly-enhanced, stably trapped acoustic radiation force on the particle. These trapping patterns and acoustic radiation force dependent on the wavelength, particle size, and particle material are investigated, respectively. It is shown that tuning the wavelength of incident acoustic wave may thus allow the formation and reconfiguration of patterns. We expect that this system may thus allow to realize self-assembly particles.