  Using pulsed acoustic waves could provide a superior selectivity for
microscale acoustic tweezers. However, the theory for the radiation force of
pulsed acoustic waves has only been recently derived and no numerical
implementations are available. In this paper, we present a finite-element
implementation of this model to simulate the transient acoustic radiation force
on small spheres. We use the model to simulate laser-guided acoustic tweezers
and optimize their performance. By enabling numerical simulations of the
transient radiation force, this work may accelerate the rational design of
pulse-based high-selectivity acoustic tweezers devices.
