Optically driven liquid crystal rotator

Keita Saito, Yasuyuki Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Rotation of nematic liquid crystal (NLC) droplets by irradiation of focused circular polarized light is experimentally studied. Optical torque transferred to a droplet depends on its size. We discuss the relation between the LC molecular alignment inside the droplet and its rotation mechanism. In a larger droplet, the internal LC alignment is bipolar and waveplate behavior becomes dominant. In a smaller droplet, the optical anisotropy reduces with decrease of its size and scattering process mainly contributes its rotation. We also construct multiple LC rotators system using a holographic optical tweezer. Such optically controllable vortex enables us to realize complex flow field at micron-scale.

Original languageEnglish
Title of host publicationOptical Manipulation and Structured Materials Conference, OMC 2022
EditorsTakashige Omatsu
ISBN (Electronic)9781510660656
Publication statusPublished - 2022
Event2022 Optical Manipulation and Structured Materials Conference, OMC 2022 - Yokohama, Japan
Duration: Apr 18 2022Apr 22 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Conference2022 Optical Manipulation and Structured Materials Conference, OMC 2022

All Science Journal Classification (ASJC) codes

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


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