Transfer of orbital angular momentum to metal particles confined using optical tweezers

O'Neil, A.T. and Padgett, M. (2001) Transfer of orbital angular momentum to metal particles confined using optical tweezers. Proceedings of the SPIE: The International Society for Optical Engineering, 4274, 177 -182. (doi:10.1117/12.432508)

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Publisher's URL: http://dx.doi.org/10.1117/12.432508

Abstract

Using Laguerre-Gaussian beams in an inverted optical tweezers geometry we observe that silver particles, 2 mu m in diameter, are confined to an annulus around the outside of the beam. This annulus is situated 4 mu m below the beam waist where the upward scattering force counterbalances gravity. The scattering force results in a transfer of the orbital angular momentum content of the beam to the particle causing it to rotate about the beam axis.

Item Type:Articles
Additional Information:Presented at the SPIE Laser Applications in Microelectronic and Optoelectronic Manufacturing VI conference, 22 January 2001, San Jose, CA, USA
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles
Authors: O'Neil, A.T., and Padgett, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Proceedings of the SPIE: The International Society for Optical Engineering
Publisher:SPIE - The International Society for Optical Engineering
ISSN:0277-786X

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