Single Gradientless Light Beam Drags Particles as Tractor Beams

Andrey Novitsky, Cheng-Wei Qiu, Haifeng Wang

Research output: Contribution to journalJournal articleResearchpeer-review

421 Downloads (Pure)

Abstract

Usually a light beam pushes a particle when the photons act upon it. We investigate the optical forces by nonparaxial gradientless beams and find that the forces can drag suitable particles all the way towards the light source. The major criterion of realizing the backward dragging force is the strong nonparaxiality of the light beam, which contributes to the pulling force owing to momentum conservation. The nonparaxiality of the Bessel beam can be manipulated to possess a dragging force along both the radial longitudinal directions, i.e., a "tractor beam" with stable trajectories is achieved. © 2011 American Physical Society.
Original languageEnglish
JournalPhysical Review Letters
Volume107
Issue number20
Pages (from-to)203601
ISSN0031-9007
DOIs
Publication statusPublished - 2011

Bibliographical note

Copyright 2011 American Physical Society.

Cite this