Application of light beams with nonzero angular momentum in optical study of micrometer-size aerosol particles

Aleksandr Bekshaev; Sergey Kontush; Andriy Yurievich Popov; Rene Van Grieken

doi:10.1117/12.428282

30 May 2001 Application of light beams with nonzero angular momentum in optical study of micrometer-size aerosol particles

Aleksandr Bekshaev, Sergey Kontush, Andriy Yurievich Popov, Rene Van Grieken

Author Affiliations +

Proceedings Volume 4403, Second International Conference on Singular Optics (Optical Vortices): Fundamentals and Applications; (2001) https://doi.org/10.1117/12.428282
Event: Singular Optics 2000: Fundamentals and Applications of Optical Vortices, 2000, Crimea, Ukraine

Abstract

A geometrical optics consideration of the torque exerted on a particle by a light beam with an angular momentum is presented. The beam is modelled as a bundle of rays directed normally to the wave front and carrying the power proportional to the local value of the light intensity. A numerical code is developed to calculate the ray propagation through the refracting and absorbing particle of arbitrary convex shape, which is applied to evaluation of the beam angular momentum transformation during the light interaction with the particle. Calculated values of the mechanical reaction experienced by the particle are used for the estimation of its motion in the optical levitation trap. The possibility of regular and predictable particle behavior, which allows studying complicated patterns of light scattering by means of a single fixed detector, is shown.

Citation Download Citation

Aleksandr Bekshaev, Sergey Kontush, Andriy Yurievich Popov, and Rene Van Grieken "Application of light beams with nonzero angular momentum in optical study of micrometer-size aerosol particles", Proc. SPIE 4403, Second International Conference on Singular Optics (Optical Vortices): Fundamentals and Applications, (30 May 2001); https://doi.org/10.1117/12.428282

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