Optical micro-manipulation of beads in axial and lateral directions with upward and downward-directed laser beams

Author

Ukita, Hiroo ; Saitoh, Takashi

Author_Institution

Fac. of Sci. & Eng., Ritsumeikan Univ., Shiga, Japan

Volume

1

fYear

1999

fDate

1999

Firstpage

169

Abstract

We measured the optical-trapping force on polystyrene and glass microspheres of different diameters in two orthogonal directions with upward-directed and downward-directed laser beams. We confirmed that the upward-directed beam has significantly higher trapping efficiency than the downward one for both polystyrene glass microspheres. The experimental minimum trapping powers are in fairly good agreement with the theoretical ones for axial trapping, but not in good agreement for lateral trapping

Keywords

laser beam effects; radiation pressure; axial directions; axial trapping; beads; downward-directed laser beams; glass microspheres; lateral directions; lateral trapping; minimum trapping powers; optical micro-manipulation; optical-trapping force; polystyrene glass microspheres; polystyrene microspheres; trapping efficiency; upward-directed laser beams; Charge carrier processes; Force measurement; Glass; Gravity; Laser beams; Laser theory; Optical microscopy; Optical refraction; Particle beams; Power measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting

Conference_Location

San Francisco, CA

ISSN

1092-8081

Print_ISBN

0-7803-5634-9

Type

conf

DOI

10.1109/LEOS.1999.813532

Filename

813532