Formation of colloidal periodic structure by two beam interference

Hyun Ik Kim, Kang Bin Im, Cha-Hwan Oh, Seok Ho Song, Pill Soo Kim

Research output: Contribution to journalConference article


We trapped and manipulated the micro-particles by two beam interference. The micro-particles were pulled toward the bright fringe and were aligned along the periodic interference pattern. We observed the distribution of trapped particles at the various polarization configurations by adjusting the polarization states and measured the optical force acting on the particles. The particles were trapped in bright fringe by intensity gradient in the case of parallel polarization state. In the case of perpendicular polarization state, the particles aligned along periodic pattern even though there was no intensity modulation. Consequently, the results showed that the optical force can be generated from not only the intensity modulation but also no intensity modulation.

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003 Dec 1
EventPhysics, Theory, and Applications of Periodic Structures in Optics II - San Diego, CA, United States
Duration: 2003 Aug 52003 Aug 7


  • Gradient force
  • Interference
  • Optical tweezers
  • Periodic structure

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