The role of spectral bandwidth in transverse optical binding

Michael Mazilu, Andrew P. Rudhall, Ewan Wright, Kishan Dholakia

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


Binding between optically co-trapped micro-particles occurs when the scattered optical fields are sufficient to compete with the trapping forces. Such optical binding is seen as being pertinent to large-scale micro-manipulation due to the significant forces present within an optical trapping system comprising multiple micro-particles. One aspect of optical binding involves an inter-particle force relationship that is strongly dependent on optical frequency. In our study we theoretically show that a broadened spectral content associated with frequency doubled broadband ultrashort pulses can result in spatial overlap of contained frequencies. The binding force oscillations are averaged out when sufficient spectral content is present within the pulse.

Original languageEnglish (US)
Title of host publicationOptical Trapping and Optical Micromanipulation IX
StatePublished - 2012
EventOptical Trapping and Optical Micromanipulation IX - San Diego, CA, United States
Duration: Aug 12 2012Aug 16 2012

Publication series

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


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


  • Colloid
  • Optical binding
  • Optical trapping
  • Ultrashort pulses

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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