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Proceedings Paper

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

Using Laguerre-Gaussian beams in an inverted optical tweezers geometry we observe that silver particles, 2 microns in diameter, are confined to an annulus around the outside of the beam. This annulus is situated 4 microns 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.

Paper Details

Date Published: 29 June 2001
PDF: 6 pages
Proc. SPIE 4274, Laser Applications in Microelectronic and Optoelectronic Manufacturing VI, (29 June 2001); doi: 10.1117/12.432508
Show Author Affiliations
Anna T. O'Neil, Univ. of Glasgow and Univ. of St. Andrews (United Kingdom)
Miles J. Padgett, Univ. of Glasgow (United Kingdom)

Published in SPIE Proceedings Vol. 4274:
Laser Applications in Microelectronic and Optoelectronic Manufacturing VI
Malcolm C. Gower; Henry Helvajian; Koji Sugioka; Jan J. Dubowski, Editor(s)

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