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

E. Higurashi, R. Sawada, T. Ito

Research output: Contribution to journalArticlepeer-review

75 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 - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

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