Open AccessOptically-driven Rotation of Perfectly Absorbing Nanoparticles
Author(s) -
Adrià Canós Valero,
Alexander S. Shalin
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1461/1/012021
Subject(s) - poynting vector , dielectric , angular momentum , physics , optics , optical force , scattering , optical tweezers , dipole , rotation (mathematics) , discrete dipole approximation , computational physics , classical mechanics , optoelectronics , quantum mechanics , geometry , mathematics , magnetic field
Optical manipulation of small scatterers assisted with auxiliary nanostructures is a very promising and already proven concept. In this work, we investigate an interesting application of angular momentum transfer in light scattering by dielectric nanoparticles. We show that, when illuminated by a circularly polarized plane wave, the scattered Poynting vector from a homogeneous dielectric cube presents a divergence-free component. Such Poynting vector distribution induces rotational motion via angular momentum transfer to any strong absorbing particle in the vicinity of the scatterer. We illustrate this effect in the case perfectly absorbing dipolar nanoparticles. The proposed design is the first step towards an efficient all-dielectric mixing scheme for micro-fluidics applications.