  We consider light-induced binding and motion of dielectric microparticles in
an optical waveguide that gives rise to a back-action effect such as light
transmission oscillating with time. Modeling the particles by dielectric slabs
allows us to solve the problem analytically and obtain a rich variety of
dynamical regimes both for Newtonian and damped motion. This variety is clearly
reflected in temporal oscillations of the light transmission. The
characteristic frequencies of the oscillations are within the ultrasound range
of the order of $10^{5}$ Hz for micron size particles and injected power of the
order of 100 mW. In addition, we consider driven by propagating light dynamics
of a dielectric particle inside a Fabry-Perot resonator. These phenomena pave a
way for optical driving and monitoring of motion of particles in waveguides and
resonators.
