Extended-area optically induced organization of microparticies on a surface

V Garces-Chavez, K Dholakia, G C Spalding

Research output: Contribution to journalArticlepeer-review

108 Citations (Scopus)

Abstract

To extend beyond the limited field of view associated with optical tweezers, we implement a new geometry for lensless optical trapping ("LOT"). A Ronchi ruling is imaged at a sample interface beyond the critical angle for total internal reflection imposing local structure upon the optical fields. Due to the resulting transverse optical gradients, more than one thousand microparticles spanning 1 mm(2) were organized into microchannels that are entirely optical in origin. A generalized approach is presented, allowing for either guiding or stable trapping, as a function of the relative intensity of the counterpropagating surface waves. (C) 2005 American Institute of Physics. [DOI: 10.1063/1.1843283]

Original languageEnglish
Number of pages3
JournalApplied Physics Letters
Volume86
DOIs
Publication statusPublished - 17 Jan 2005

Keywords

  • CHANNELED WAVE-GUIDE
  • EVANESCENT FIELD
  • PARTICLES
  • SPHERE
  • BEAM

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