Independent polarisation control of multiple optical traps

Daryl Preece, Stephen Keen, Elliot Botvinick, Richard Bowman, Miles Padgett, Jonathan Leach

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


We present a system which uses a single spatial light modulator to control the spin angular momentum of multiple optical traps. These traps may be independently controlled both in terms of spatial location and in terms of their spin angular momentum content. The system relies on a spatial light modulator used in a "split-screen" configuration to generate beams of orthogonal polarisation states which are subsequently combined at a polarising beam splitter. Defining the phase difference between the beams with the spatial light modulator enables control of the polarisation state of the light. We demonstrate the functionality of the system by controlling the rotation and orientation of birefringent vaterite crystals within holographic optical tweezers. (C) 2008 Optical Society of America

Original languageEnglish
Pages (from-to)15897-15902
Number of pages6
JournalOptics Express
Issue number20
Publication statusPublished - 29 Sept 2008


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