Optically induced angular alignment of trapped birefringent micro-objects by linearly polarized light

E. Higurashi, Renshi Sawada, T. Ito

    Research output: Contribution to journalArticlepeer-review

    68 Citations (Scopus)

    Abstract

    Optically induced mechanical angular alignment of trapped birefringent micrometer-sized objects resulting from the transfer of angular momentum produced by birefringence using linearly polarized light has been experimentally demonstrated. Fluorinated polyimide (PMDA/TFDB) micro-objects having a large birefringence of [Formula Presented] (refractive indices [Formula Presented] [Formula Presented] which were fabricated by micromachining (reactive ion etching) and suspended in water [Formula Presented] were trapped and manipulated by radiation pressure from a single focused Gaussian beam (wavelength [Formula Presented] [Formula Presented] The effect of the linearly polarized light on such micro-objects showed that they were angularly aligned about the laser beam axis and their angular position could be smoothly controlled by rotating the vibration plane of the electric field. We have shown that the retardation of the birefringent micro-object determines which axis (fast or slow) of the micro-object coincides with the vibration plane of the electric field of the incident light.

    Original languageEnglish
    Pages (from-to)3676-3681
    Number of pages6
    JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
    Volume59
    Issue number3
    DOIs
    Publication statusPublished - Jan 1 1999

    All Science Journal Classification (ASJC) codes

    • Statistical and Nonlinear Physics
    • Mathematical Physics
    • Condensed Matter Physics
    • Physics and Astronomy(all)

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