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Title: Singular diffraction-free surface plasmon beams generated by overlapping phase-shifted sources
Authors: Wang, Rong (EEE)
Wei, Shibiao
Lin, Jiao
Wang, Qian
Yuan, Guanghui
Du, Luping
Xu, Le
Hong, Minghui
Min, Changjun
Yuan, Xiaocong
Issue Date: 2013
Source: Wei, S., Lin, J., Wang, Q., Yuan, G., Du, L., Wang, R., et al. (2013). Singular diffraction-free surface plasmon beams generated by overlapping phase-shifted sources. Optics Letters, 38(7), 1182-1184.
Series/Report no.: Optics letters
Abstract: We propose and experimentally demonstrate the singular surface plasmon beam that presents a dark channel generated by a point dislocation and a long diffraction-free propagation distance up to 70λsp. The singular surface beam is the result of the interference of two surface plasmon polariton (SPP) plane waves, which are launched by two coupling gratings with lateral displacement. An aperture-type near-field scanning optical microscope is used to map the intensity distribution of the singular SPP waves. The propagating point dislocation embedded in the beam is shown by full-wave calculations and is later verified by near-field interference in the experiment.
DOI: 10.1364/OL.38.001182
Rights: © 2013 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: []. 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
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