Optical Review

, Volume 4, Issue 4, pp 447–449

Theoretical Demonstration of a Newly Designed Micro-Rotator Driven by Optical Pressure on a Light Incident Surface

  • Hiroo Ukita
  • Kenji Nagatomi

DOI: 10.1007/s10043-997-0447-9

Cite this article as:
Ukita, H. & Nagatomi, K. OPT REV (1997) 4: 447. doi:10.1007/s10043-997-0447-9


A newly designed cylindrical optical micro-rotator which has slopes for trapping and rotation on its upper surface is proposed. The cylindrical shape is effective in decreasing viscous drag force (damping factor) in the medium. A ray-tracing method considering the beam waist is employed to analyze the radiation pressure exerted on the upper surface of the rotator. We have demonstrated optical trapping and high speed rotation for various optical beam parameters such as the lens numerical aperture and the Gaussian mode profile as well as rotator shape parameters including oblique angle, height and diameter.

Key words

optical micro-rotator cylindrical rotator optical torque optical tweezers ray-tracing viscosity 

Copyright information

© The Optical Society of Japan 1997

Authors and Affiliations

  • Hiroo Ukita
    • 1
  • Kenji Nagatomi
    • 1
  1. 1.Faculty of Science and EngineeringRitsumeikan UniversityShigaJapan

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