Manipulation of microdisks in laser tweezers

Zhengdong Cheng, A. Fernandez De Las Nieves, Manuel Marquez, D. A. Weitz, T. G. Mason, P. M. Chaikin

    Research output: Contribution to journalConference articlepeer-review


    Short thin cylinders can be the basic part of mesoscopic actuators powered by laser tweezers. We demonstrate that micro size birefringent colloidal coins can be positioned translationally and orientationally in advance of the prediction of current the oretical modeling. Circularly polarized laser tweezers keep driving the rotation of the microdisk. Viscous flow between a hard wall and a microdisk excites the disk to an oscillation orbit. These disks can be fabricated via solidification of emulsion drops by tuning temperature or solvent concentration so that molecules in the drop assuming a smectic phase.

    Original languageEnglish (US)
    Article number12
    Pages (from-to)99-108
    Number of pages10
    JournalProceedings of SPIE - The International Society for Optical Engineering
    StatePublished - 2004
    EventOptical Trapping and Optical Micromanipulation - Denver, CO, United States
    Duration: Aug 2 2004Aug 6 2004


    • Birefringence
    • Laser tweezers
    • Microdisks
    • Oscillation
    • Rotation

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering


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