Rhythmic motion of colloidal particles driven by optical force

Keita Saito, Yasuyuki Kimura

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

1 Citation (Scopus)


We observed the collective motion of colloidal particles moving along a circular path in water as a model system of artificial active matter. The particles were driven by optical vortex using holographic optical tweezer. They exhibit rhythmic motion with spontaneous formation of clusters and their dissociation by hydrodynamic interaction. The hydrodynamic interaction in spatially confined system alter their rhythmic motion dramatically. For example, we found that the relative magnitude of the angular velocity for a doublet to a singlet reversed in free space and in strongly confined system. The transition of rhythmic motions was observed by varying spatial confinement.

Original languageEnglish
Title of host publicationOptical Manipulation Conference
EditorsRyuji Morita, Takashige Omatsu
ISBN (Electronic)9781510610057
Publication statusPublished - 2017
EventOptical Manipulation Conference 2017 - Yokohama, Japan
Duration: Apr 19 2017Apr 21 2017

Publication series

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


OtherOptical Manipulation Conference 2017

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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