NDLI: Orbital angular momentum of a high order Bessel light beam

Content Provider	IEEE Xplore Digital Library
Author	Garces-Chavez, V. Arlt, J. Dholakia, K. Volke-Sepulveda, K. Chavez-Cerda, S.
Copyright Year	2002
Description	Author affiliation: Sch. of Phys. & Astron., Univ. of St. Andrews, UK (Garces-Chavez, V.; Arlt, J.; Dholakia, K.)
Abstract	Summary form only given. We demonstrate experimentally for the first time, that a high order Bessel beam possesses orbital angular momentum (OAM). We demonstrate transfer of OAM from such a beam to trapped transparent particles in optical tweezers. Additionally, we examine theoretically, within a rigorous vectorial treatment, the local angular momentum density for a high order Bessel beam (HOBB) and find local variations in this density when compared to Laguerre-Gaussian beams. For transparent particles the orbital angular momentum is transferred by scattering/reflection of the incident light beam as in the case of metallic particles. Importantly we obtained quantitative results for the rotation rate which has a linear dependence on the orbital angular momentum content of the light beam. The measured rotation rates correspond to a transfer of about 1% of the Bessel beam's orbital angular momentum which is consistent with calculations based on a transfer mechanism due to scattering.
Sponsorship	IEEE/Lasers & Electro-Opt. Soc. OSA-Opt. Soc. America Quantum Electron. Div. Eur. Phys. Soc. Opt. Soc. Japanese Quantum Electron. Joint Group
Starting Page	223
Ending Page	224
File Size	310505
Page Count	2
File Format	PDF
ISBN	1557527067
DOI	10.1109/CLEO.2002.1033647
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Optical Soc. of America
Subject Keyword	Particle beams Orbital calculations Particle beam measurements Light scattering Particle scattering Charge carrier processes Extraterrestrial measurements Optical scattering Optical reflection Rotation measurement
Content Type	Text
Resource Type	Article

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