Dynamics of carbon nanoparticles distribution in reconstruction of optical field

This study proposes a new approach for correlation-optical diagnostics of a complex optical field created by light scattering on a rough surface. The possibility of using fluorescent nanoparticles of a size of about 30-120 nm for diagnosing the distribution of optical flows in the speckle field has been analyzed. A model experiment for investigation motion of carbon nanoparticles in a speckle field is demonstrated. Under the influence of gradient optical forces, carbon nanoparticles move in an optical field and are captured by the singularities of the field. The change of particle position in time in a three-dimensional field due to the action of longitudinal and transverse component of optical force is demonstrated.