期刊
OPTICS LETTERS
卷 41, 期 3, 页码 614-617出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.000614
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- Direccion General Asuntos del Personal Academico, Universidad Nacional Autonoma de Mexico (DGAPA, UNAM) [IA103615, IN115614]
- Consejo Nacional de Ciencia y Tecnologia (CONACYT), Catedra Moshinsky
Full-three-dimensional (3D) manipulation of individual glass beads with radii in the range of 2-8 mu m is experimentally demonstrated by using a single Bessel light beam focused through a low-numerical-aperture lens (NA = 0.40). Although we have a weight-assisted trap with the beam propagating upward, we obtain a stable equilibrium position well away from the walls of the sample cell, and we are able to move the particle across the entire cell in three dimensions. A theoretical analysis for the optical field and trapping forces along the lateral and axial directions is presented for the focused-Bessel trap. This trap offers advantages for 3D manipulation, such as an extended working distance, a large field of view, and reduced aberrations. (C) 2016 Optical Society of America
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