title: Radiation force of scalar and electromagnetic twisted Gaussian Schell-model beams.
abstract: Radiation force of a focused scalar twisted Gaussian Schell-model (TGSM) beam on a Rayleigh dielectric sphere is investigated. It is found that the twist phase affects the radiation force and by raising the absolute value of the twist factor it is possible to increase both transverse and longitudinal trapping ranges at the real focus where the maximum on-axis intensity is located. Numerical calculations of radiation forces induced by a focused electromagnetic TGSM beam on a Rayleigh dielectric sphere are carried out. It is found that radiation force is closely related to the twist phase, degree of polarization and correlation factors of the initial beam. The trapping stability is also discussed.
authors.affiliation: School of Physical Science and Technology, Soochow University, Suzhou, China.
authors.forename: Chengliang
authors.initials: C
authors.lastname: Zhao
authors.forename: Yangjian
authors.initials: Y
authors.lastname: Cai
authors.forename: Olga
authors.initials: O
authors.lastname: Korotkova
mesh_terms: D000465:Algorithms; D055590:Electromagnetic Phenomena; D004867:Equipment Design; D007834:Lasers; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000379:methods*; D010825:Physics / Q000379:methods; D012542:Scattering, Radiation; D014783:Viscosity