Size Dependence of Rotation Frequency of Individual Laser Trapped Liquid Crystal Droplets

Saulius Juodkazis, Masaya Shikata, Toshimasa Takahashi, Shigeki Matsuo, Hiroaki Misawa

Research output: Contribution to journalArticle

26 Citations (Scopus)


We report the development of an all-optical liquid-crystal (LC) switch realized by laser manipulation of a three-dimensionally trapped micrometer-size nematic liquid-crystal droplet. Transmission of a polarizer/LC droplet/analyzer system can be modulated at a frequency as high as 103 Hz for micrometer sized LC droplets. An optical switching corresponds to the rotation of the LC droplet by an angle of π/4. The dependence of rotation frequency on LC droplet size is explained in terms of the circularly polarized light scattering by the molecules of the LC droplet. This scattering is responsible for the transfer of angular momentum from the light to the LC droplet.

Original languageEnglish
Pages (from-to)518-520
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number5 PART 2
Publication statusPublished - 1999 May 1
Externally publishedYes



  • Laser trapping
  • Light scattering
  • Liquid crystal
  • Micromachining
  • Optical switching

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this