Extended-area optically induced organization of microparticles on a surface

V. Garćs-Chávez, K. Dholakia, G. C. Spalding

Research output: Contribution to journalArticle

103 Citations (Scopus)


To extend beyond the limited field of view associated with optical tweezers, we implement a new geometry for lensless optical trapping ("LOT"). A Ronchi ruling is imaged at a sample interface beyond the critical angle for total internal reflection imposing local structure upon the optical fields. Due to the resulting transverse optical gradients, more than one thousand microparticles spanning 1 mm2 were organized into microchannels that are entirely optical in origin. A generalized approach is presented, allowing for either guiding or stable trapping, as a function of the relative intensity of the counterpropagating surface waves.

Original languageEnglish
Article number031106
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2005 Jan 17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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