Optical tweezers with increased axial trapping efficiency

NB Simpson, David McGloin, Kishan Dholakia, L Allen, MJ Padgett

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)

Abstract

We demonstrate that the axial trapping efficiency in optical tweezers is improved by using a Laguerre-Gaussian laser mode as the trapping beam. For a wide range of particle sizes and sample cell depths, the laser power required with an l = 3 Laguerre-Gaussian mode is reduced by a factor of two compared with that of the fundamental mode. This is important for biological applications where a reduction in the laser power lessens the risk of damage to living samples.

Original languageEnglish
Pages (from-to)1943-1949
Number of pages7
JournalJournal of Modern Optics
Volume45
Issue number9
Publication statusPublished - Sept 1998

Keywords

  • ORBITAL ANGULAR-MOMENTUM
  • GAUSSIAN LASER MODES
  • MICROSCOPIC PARTICLES
  • BIOLOGICAL CELLS
  • LIGHT
  • FORCES
  • MANIPULATION
  • BEAMS

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