A. A. Afanas'ev, L. S. Gaida, D. V. Guzatov, A. N. Rubinov, A. Ch. Svistun, “On radiation forces acting on a transparent nanoparticle in the field of a focused laser beam”, Kvantovaya Elektronika, 2015, Volume 45, Number 10,Pages <nobr>904

This article is cited in 7 papers

Nanophotonics

On radiation forces acting on a transparent nanoparticle in the field of a focused laser beam

A. A. Afanas'ev^a, L. S. Gaida^b, D. V. Guzatov^b, A. N. Rubinov^a, A. Ch. Svistun^b

^a B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk
^b Yanka Kupala State University of Grodno

Abstract: Radiation forces acting on a transparent spherical nanoparticle in the field of a focused Gaussian laser beam are studied theoretically in the Rayleigh scattering regime. Expressions are derived for the scattering force and Cartesian components of the gradient force. The resultant force acting on a nanoparticle located in the centre of a laser beam is found. The parameters of the focused beam and optical properties of the nanoparticle for which the longitudinal component of the gradient force exceeds the scattering force are determined. Characteristics of the transverse gradient force are discussed.

Keywords: nanoparticle, radiation forces, light scattering, polarisability, permittivity, focal length, Gaussian beam, waist.

PACS: 42.50.Wk, 78.67.Bf

Received: 05.03.2015