Microfluidic optical sorting: Particle selection in an optical lattice

Michael P. MacDonald*, Steven Neale, Lynn Paterson, Andrew Riches, Gabriel C. Spalding, Kishan Dholakia

*Corresponding author for this work

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

5 Citations (Scopus)


The path that a mesoscopic polarisable particle takes as it flows through a lattice of intensity maxima and minima (optical lattice) depends crucially upon the degree to which it interacts with the lattice. Two particles of dissimilar size, refractive index or even shape will interact in a different manner with such a lattice. Combining this selective interaction with a guiding mechanism has allowed us to achieve lateral separation of particles by all these properties simply by flowing them through an angled optical lattice. We present such particle separation in a variety of three-dimensional optical lattices discussing the importance of parameters such as flow speed, lattice intensity, lattice constant, lattice angle, maxima interconnectivity and flow chamber design. We also present cell sorting with the separation of erythrocytes from lymphocytes and present our flow chamber fabrication methods.

Original languageEnglish
Title of host publicationOptical Trapping and Optical Micromanipulation
EditorsK. Dholakia, G. C. Spalding
Publication statusPublished - 18 Oct 2004
EventOptical Trapping and Optical Micromanipulation - Denver, CO, United States
Duration: 2 Aug 20046 Aug 2004

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


ConferenceOptical Trapping and Optical Micromanipulation
Country/TerritoryUnited States
CityDenver, CO


  • Cell sorting
  • Microfluidics
  • Optical Fractionation
  • Optical Lattice
  • Optical Manipulation
  • Optical Sorting

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


Dive into the research topics of 'Microfluidic optical sorting: Particle selection in an optical lattice'. Together they form a unique fingerprint.

Cite this