Manipulation of single and multiple low-index particles by means of optical tweezers

Valeria Garbin*, Dan Cqjoc, Enrico Ferrari, Revati Kulkarni, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Higher-order laser beams were demonstrated to enable optical manipulation of low-index-particles. In this work single-ringed Laguerre-Gaussian beams, obtained by means of phase-only diffractive optical elements, are used to perform manipulation of phospholipid-shelled gas microbubbles in water. Implementation of diffractive optical elements on a programmable spatial light modulator allows to generate also arrays of Laguerre-Gaussian traps. We show manipulation of low-index particles by properly displaying a suitable sequence of diffractive optical elements. Control over the distance between the trapped particles in real time is also demonstrated.

Original languageEnglish (US)
Article number59301X
Pages (from-to)1-9
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
Externally publishedYes
EventOptical Trapping and Optical Micromanipulation II - San Diego, CA, United States
Duration: Jul 31 2005Aug 4 2005


  • Diffractive optical elements
  • Laguerre-gaussian beam
  • Low-index particles
  • Microbubbles
  • Multiple trapping
  • Spatial light modulator

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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