Abstract
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 mm(2) 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. (C) 2005 American Institute of Physics. [DOI: 10.1063/1.1843283]
Original language | English |
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Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 86 |
DOIs | |
Publication status | Published - 17 Jan 2005 |
Keywords
- CHANNELED WAVE-GUIDE
- EVANESCENT FIELD
- PARTICLES
- SPHERE
- BEAM