Health & Environmental Research Online (HERO)


Print Feedback Export to File
3015650 
Journal Article 
Radiation forces on Rayleigh particles using a focused anomalous vortex beam under paraxial approximation 
Zhang, D; Yang, Y 
2015 
1 
Optics Communications
ISSN: 0030-4018
EISSN: 1873-0310 
336 
202-206 
WOS:000345688200037 
The radiation forces of focused anomalous vortex beams acting upon a Rayleigh dielectric sphere are studied theoretically and numerically, based on the Rayleigh scattering theory, within the framework of paraxial approximation ft is shown that a focused anomalous vortex beam with a suitable mode order and topological charge can be used to trap and manipulate a dielectric sphere whose refractive index is smaller or bigger than the ambient one at the focal point. The influences of the topological charges and the beam orders on the radiation force are also discussed. Furthermore, the stability conditions for effective trapping the Rayleigh particles are analyzed. (C) 2014 Elsevier B.V. All rights reserved. 
Focused anomalous vortex beam; Radiation force; Rayleigh spherical particles