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Proceedings Paper

Near-field plasmonic beam engineering by complex amplitude modulation based on metasurface (Conference Presentation)
Author(s): Lingling Huang; Xu Song; Lin Sun; Xiaomeng Zhang; Ruizhe Zhao; Xiaowei Li; Jia Wang; Benfeng Bai; Yongtian Wang; Thomas Zentgraf

Paper Abstract

Metasurfaces provide great feasibilities for tailoring both propagation waves and surface plasmon polaritons (SPPs). Manipulation of SPPs with arbitrary complex field distribution is an important issue in integrated nanophotonics due to their capability of guiding waves with subwavelength footprint. Here, with metasurface composed of nano aperture arrays, a novel approach is proposed and experimentally demonstrated which can effectively manipulate complex amplitude of SPPs in the near-field regime. Positioning the azimuthal angles of nano aperture arrays and simultaneously tuning their geometric parameters, the phase and amplitude are controlled based on Pancharatnam-Berry phases and their individual transmission coefficients. For the verification of the proposed design, Airy plasmons and axisymmetric Airy beams are generated. The results of numerical simulations and near-field imaging are well consistent with each other. Besides, 2D dipole analysis is also applied for efficient simulations. This strategy of complex amplitude manipulation with metasurface can be used for potential applications in plasmonic beam shaping, integrated optoelectronic systems and surface wave holography.

Paper Details

Date Published: 23 May 2018
Proc. SPIE 10672, Nanophotonics VII, 106721I (23 May 2018); doi: 10.1117/12.2303819
Show Author Affiliations
Lingling Huang, Beijing Institute of Technology (China)
Xu Song, Beijing Institute of Technology (China)
Lin Sun, Tsinghua Univ. (China)
Xiaomeng Zhang, Tsinghua Univ. (China)
Ruizhe Zhao, Beijing Institute of Technology (China)
Xiaowei Li, Beijing Institute of Technology (China)
Jia Wang, Tsinghua Univ. (China)
Benfeng Bai, Tsinghua Univ. (China)
Yongtian Wang, Beijing Institute of Technology (China)
Thomas Zentgraf, Univ. Paderborn (Germany)

Published in SPIE Proceedings Vol. 10672:
Nanophotonics VII
David L. Andrews; Angus J. Bain; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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