dc.contributor.authorShen, Z.
dc.contributor.authorHu, Zongjiang
dc.contributor.authorYuan, Guanghui
dc.contributor.authorMin, C. J.
dc.contributor.authorFang, H.
dc.contributor.authorYuan, Xiaocong
dc.identifier.citationShen, Z., Hu, Z., Yuan, G. H., Min, C. J., Fang, H., & Yuan, X.-C. (2012). Visualizing orbital angular momentum of plasmonic vortices. Optics Letters, 37(22), 4627-4629.en_US
dc.description.abstractPlasmonic vortices (PVs) are generated by focusing a radially polarized optical vortex (OV) beam onto a metal surface. The intensity distribution of the PV is registered with a near-field scanning optical microscopy and agrees well with a theoretical prediction as well as numerical calculation. Beside the dark central spot, the numerical calculation also shows an azimuthal Poynting vector belonging to the PV, implying that the orbital angular momentum (OAM) was transferred from the radially polarized OV. To directly verify the OAM, plasmonic trapping experiments with gold micrometer particles are performed and the particle rotation is visualized. Further experiments by varying the topological charge of radially polarized OVs show the corresponding changes in rotation in terms of speed and radius.en_US
dc.relation.ispartofseriesOptics lettersen_US
dc.rights© 2012 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/OL.37.004627]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineering
dc.titleVisualizing orbital angular momentum of plasmonic vorticesen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionPublished versionen_US

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