Towards total photonic control of complex-shaped colloids by vortex beams.

We demonstrate optical trapping and orientational control over colloidal particles having complex shapes in an anisotropic host fluid using a dynamic holographic optical tweezers system. Interactions between a colloidal particle and the toroidal intensity distributions of focused Laguerre-Gaussian beams allow for stable optical tweezing and provide a tunable tilt of the particle out of the focal plane. Use of an aligned nematic liquid crystal as the host fluid suppresses rotations about the optical axis arising from angular momentum transfer from the beam and effectively defines a rotational axis for the colloid within the trap.

• Publication year

  2011

• Venue

  Optics Express

• Publication date

  2011-09-12

• Fields of study

  Materials Science, Physics, Medicine

• Identifiers
  DOI 10.1364/OE.19.018182PMID 21935184
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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