In depth fiber optic trapping of low-index microscopic objects

K. S. Mohanty, C. Liberale, S. K. Mohanty, V. Degiorgio

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


We demonstrate that a focused beam through a microaxicon built on the tip of a single mode optical fiber can trap low-index objects at much larger depths as compared to the vortex beam tweezers generated using high numerical aperture microscope objectives. The measured transverse trapping force for low-index objects in Mie regime was found to depend on particle size and on distance of trapped objects from the fiber tip. While axial movement of trapped low-index objects was achieved by variation in trap beam power, transportation in three dimensions was achieved by maneuvering the fiber.

Original languageEnglish (US)
Article number151113
JournalApplied Physics Letters
Issue number15
StatePublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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