Optical forces in a non-diffracting vortex beam

0397679 - ÚPT 2014 RIV GB eng J - Journal Article
Šiler, Martin - Zemánek, Pavel
Optical forces in a non-diffracting vortex beam.
Journal of Quantitative Spectroscopy and Radiative Transfer. Roč. 126, September (2013), s. 78-83. ISSN 0022-4073. E-ISSN 1879-1352
R&D Projects: GA ČR GPP205/12/P868; GA MŠMT LH12018; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : dielectric microparticle * non-diffracting vortex beam
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 2.288, year: 2013

Optical force acting upon a dielectric microparticle illuminated by a non-diffracting vortex beam is expressed using the generalized Lorenz-Mie theory (GLMT). Numerical results are presented for different widths and topological charges of the vortex beam. We show that such particle may be stably trapped either in the dark center of the vortex beam, in one of the two stable positions placed off the optical axis, or as the third option it may circulate along almost circular trajectory having its radius smaller or equal to the radius of the smallest high intensity vortex ring.
Permanent Link: http://hdl.handle.net/11104/0225330