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Related Experiment Videos

Microinstrument gradient-force optical trap.

S D Collins1, R J Baskin, D G Howitt

  • 1Department of Electrical Engineering, University of California, Davis 95616, USA. collins@ece.ucdavis.edu

Applied Optics
|September 7, 2001
PubMed
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A novel micromachined fiber-optic trap offers precise, strong three-dimensional force manipulation. This optical trap technology shows trapping forces comparable to optical tweezers for microsphere manipulation.

Area of Science:

  • Optical trapping
  • Micromachining
  • Nanotechnology

Background:

  • Optical tweezers are crucial for manipulating microscopic particles.
  • Existing methods may lack precision or require complex setups.

Purpose of the Study:

  • To present a novel micromachined fiber-optic trap.
  • To demonstrate its capability for precise three-dimensional force manipulation.

Main Methods:

  • Fabrication of a micromachined silicon and glass housing for four single-mode optical fibers.
  • Alignment of fibers to create a common intersection for a gradient-force trap.
  • Characterization using polystyrene microspheres, computer simulations, and experimental force measurements.

Main Results:

Related Experiment Videos

  • The micromachined trap achieves a strong three-dimensional gradient-force trap.
  • Trapping forces are comparable to those of traditional optical tweezers.
  • Successful capture and manipulation of polystyrene microspheres were demonstrated.

Conclusions:

  • Micromachining enables high-precision alignment for effective fiber-optic traps.
  • The developed trap is a viable alternative to optical tweezers for various applications.
  • This technology advances microparticle manipulation capabilities.