Optical tweezers with increased axial trapping efficiency

N. B. Simpson, D. McGloin, K. Dholakia, L. Allen, M. J. Padgett

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)


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
Issue number9
Publication statusPublished - 1998 Sept

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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