Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.163903
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Funding
- National Science Foundation [DMR-0922680]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0922680] Funding Source: National Science Foundation
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We experimentally demonstrate a class of tractor beams created by coherently superposing coaxial Bessel beams. These optical conveyors have periodic intensity variations along their axes that act as highly effective optical traps for micrometer-scale objects. Trapped objects can be moved selectively upstream or downstream along the conveyor by appropriately changing the Bessel beams' relative phase. The same methods used to project a single optical conveyor can project arrays of independent optical conveyors, allowing bidirectional transport in three dimensions.
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