Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/97785
Title: Visualizing orbital angular momentum of plasmonic vortices
Authors: Shen, Z.
Min, C. J.
Fang, H.
Hu, Zongjiang
Yuan, Guanghui
Yuan, Xiaocong
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Shen, 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.
Series/Report no.: Optics letters
Abstract: Plasmonic 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.
URI: https://hdl.handle.net/10356/97785
http://hdl.handle.net/10220/10929
ISSN: 0146-9592
DOI: 10.1364/OL.37.004627
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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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