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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 7 — Apr. 5, 2004
  • pp: 1417–1425

Real-time interactive optical micromanipulation of a mixture of high- and low-index particles

Peter John Rodrigo, Vincent Ricardo Daria, and Jesper Glückstad  »View Author Affiliations

Optics Express, Vol. 12, Issue 7, pp. 1417-1425 (2004)

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We demonstrate real-time interactive optical micromanipulation of a colloidal mixture consisting of particles with both lower (nL <n0 ) and higher (nH >n0 ) refractive indices than that of the suspending medium (n0 ). Spherical high- and low-index particles are trapped in the transverse plane by an array of confining optical potentials created by trapping beams with top-hat and annular cross-sectional intensity profiles, respectively. The applied method offers extensive reconfigurability in the spatial distribution and individual geometry of the optical traps. We experimentally demonstrate this unique feature by simultaneously trapping and independently manipulating various sizes of spherical soda lime micro - shells (nL ≈1.2) and polystyrene micro-beads (nH =1.57) suspended in water (n0 =1.33).

© 2004 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(230.6120) Optical devices : Spatial light modulators

ToC Category:
Research Papers

Original Manuscript: February 4, 2004
Revised Manuscript: March 29, 2004
Published: April 5, 2004

Peter Rodrigo, Vincent Daria, and Jesper Glückstad, "Real-time interactive optical micromanipulation of a mixture of high-and low-index particles," Opt. Express 12, 1417-1425 (2004)

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