Optical levitation of a non-spherical particle in a loosely focused Gaussian beam

Cited 15 time in webofscience Cited 0 time in scopus
  • Hit : 503
  • Download : 288
The optical force on a non-spherical particle subjected to a loosely focused laser beam was calculated using the dynamic ray tracing method. Ellipsoidal particles with different aspect ratios, inclination angles, and positions were modeled, and the effects of these parameters on the optical force were examined. The vertical component of the optical force parallel to the laser beam axis decreased as the aspect ratio decreased, whereas the ellipsoid with a small aspect ratio and a large inclination angle experienced a large vertical optical force. The ellipsoids were pulled toward or repelled away from the laser beam axis, depending on the inclination angle, and they experienced a torque near the focal point. The behavior of the ellipsoids in a viscous fluid was examined by analyzing a dynamic simulation based on the penalty immersed boundary method. As the ellipsoids levitated along the direction of the laser beam propagation, they moved horizontally with rotation. Except for the ellipsoid with a small aspect ratio and a zero inclination angle near the focal point, the ellipsoids rotated until the major axis aligned with the laser beam axis. (C) 2012 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2012-10
Language
English
Article Type
Article
Keywords

IMMERSED BOUNDARY METHOD; RADIATION FORCES; NUMERICAL COMPUTATIONS; DIELECTRIC SPHERE; MANIPULATION; REGIME; CELLS; SEPARATION; STRETCHER; EQUATIONS

Citation

OPTICS EXPRESS, v.20, no.21, pp.24068 - 24084

ISSN
1094-4087
URI
http://hdl.handle.net/10203/104170
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
000309955100114.pdf(2.27 MB)Download
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 15 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0