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

Anna T. O'Neil; Miles J. Padgett

doi:10.1117/12.432508

29 June 2001 Transfer of orbital angular momentum to metal particles confined using optical tweezers

Anna T. O'Neil, Miles J. Padgett

Proceedings Volume 4274, Laser Applications in Microelectronic and Optoelectronic Manufacturing VI; (2001) https://doi.org/10.1117/12.432508
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Anna T. O'Neil and Miles J. Padgett "Transfer of orbital angular momentum to metal particles confined using optical tweezers", Proc. SPIE 4274, Laser Applications in Microelectronic and Optoelectronic Manufacturing VI, (29 June 2001); https://doi.org/10.1117/12.432508

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