Abstract
We demonstrate that a speckle pattern in the spatially coherent laser field transmitted by adiffuser forms a multitude of three-dimensional intensity micro-pockets acting asparticle traps for air-borne light absorbing particles. Confinement of up to a fewthousand particles in air with a unidirectional single beam has been achieved.Theoretical analysis of the speckle defined trapping volume is in a good agreement withexperimental results on capturing of aggregates of carbon nanoparticles in air.
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