Numerical Analysis of Near-Field Optical Trapping Using Tapered Fiber Probe

Abstract

A new scheme for optical trapping is presented in this paper. The method is based on a tapered fiber probe with a tip diameter less than a light wavelength. A three-dimension gradient optical field is formed within the optical near field of the fiber probe, and a particle approaching the fiber probe tip will be trapped. The evanescent electromagnetic field in the vicinity of the fiber tip is calculated by the multiple multipole method (MMP). The intensity distributions and the trapping potential of the near fields of the tip versus the longitudinal and transverse distances from the tip are analyzed respectively. The trapping force is obtained for a dielectric particle. The numerical calculating results show the availability of this method.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2000
Accession Number
ADP011255

Entities

People

  • Ge Xia
  • Guoping Zhang
  • Lin Qi
  • Yanping Li
  • Zhongru Zhu

Organizations

  • Central China Normal University

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical

DTIC Thesaurus Topics

  • Diameters
  • Eigenvectors
  • Electromagnetic Fields
  • Fungi
  • Geometry
  • Intensity
  • Laser Beams
  • Near Field
  • Numerical Analysis
  • Optical Lattices
  • Optical Phenomena
  • Particles
  • Potential Energy
  • Probes
  • Scanning
  • Transverse
  • Waves

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Plasma Physics / Magnetohydrodynamics