Dynamic optical manipulation of colloidal systems using a spatial light modulator

Vincent R. Daria, RenÉ L. Eriksen, Jesper Glückstad

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

A method and mathematical foundation are presented for generating multiple-beam optical tweezers capable of introducing complex trapping beam configurations that enable optical manipulation for a variety of colloidal structures. The method is based on the generalized phase contrast technique for generating high intensity beam patterns from an input phase modulation encoded on a spatial light modulator. The mathematical foundation describes issues concerning how the method provides high photon efficiency adequate for generating large array traps while maintaining dynamic features. Experimental results show multiple trapping of up to 25 particles using a 200 mW laser diode operating at 830 nm. Arbitrary array beam configurations are also shown where the shape, position and size can easily be reconfigured and applied for dynamic manipulation of colloidal particles.

Original languageEnglish
Pages (from-to)1601-1614
Number of pages14
JournalJournal of Modern Optics
Volume50
Issue number10
DOIs
Publication statusPublished - Jul 2003
Externally publishedYes

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