Quasi-bessel hollow beam as optical guide for micro-particles

Li Li, Niko Eckerskorn, Richard A. Kirian, Jochen Küpper, Daniel P. DePonte, Wieslaw Krolikowski, W. M. Lee, Henry N. Chapman, Andrei V. Rode

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

3 Scopus citations


We have developed a high-aspect ratio optical pipeline aiming to produce a highly collimated stream of micron-size particles in either gaseous or vacuum environments. A hollow, first-order quasi-Bessel beam with variable divergence was generated with a phase-only spatial light modulator (SLM), by superimposing the quadratic phase of a lens and an axicon with a 0.5° base angle. The beam was further re-imaged to form a centimetre-long funnel beam with ~5μm diameter and up to 2000 length-to-diameter aspect ratio. The divergence of the central core of the Bessel beam was controlled by varying the effective lens in the hologram. The SLM-based optical beam was compared to a similar beam composed using a physical axicon. The experimental tests were conducted with 2-μm size polystyrene spherical particles to evaluate the optical force. We present estimated optical forces exerted on the particles in the transverse plane, both depending on the particle size, laser power, and background-gas pressure.

Original languageEnglish (US)
Title of host publicationOptical Trapping and Optical Micromanipulation X
ISBN (Print)9780819496607
StatePublished - 2013
Externally publishedYes
EventOptical Trapping and Optical Micromanipulation X - San Diego, CA, United States
Duration: Aug 25 2013Aug 29 2013

Publication series

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


OtherOptical Trapping and Optical Micromanipulation X
Country/TerritoryUnited States
CitySan Diego, CA


  • optical pipeline
  • optical trapping in air and in vacuum
  • optical vortex
  • quasi-Bessel beam

ASJC Scopus subject areas

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


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