Deuterogenic Plasmonic Vortices. – ScienceOpen
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      Deuterogenic Plasmonic Vortices.

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          Abstract

          The optical vortex on a chip is of extreme importance for many applications in nanoscience, and as well-known, the chiral metallic nanostructures like plasmonic vortex lenses (PVLs) can produce a spin-dependent plasmonic vortex (PV) which is governed by plasmonic spin-orbit coupling. The well-established nanophotonic theory and various experimental demonstrations all show a single PV mode in one PVL, when the excitation is fixed. Here, counterintuitively, we report the existence of the nontrivial deuterogenic PVs, besides the one predicted previously. We theoretically reveal a general spin-to-orbit coupling and experimentally demonstrate the surprising existence of multiple PVs in a single PVL even when excited by a fixed circularly polarized vortex beam. This work provides a deeper fundamental understanding of the dynamics and the near-field spin-orbit coupling in nanophotonics, which promises to flexibly manipulate the PV for emerging optical vortex-based nanotechnologies and quantum optical applications on a chip.

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          Author and article information

          Journal
          Nano Lett
          Nano letters
          American Chemical Society (ACS)
          1530-6992
          1530-6984
          Sep 09 2020
          : 20
          : 9
          Affiliations
          [1 ] School of Physics, University of Electronic Science and Technology of China, Chengdu 611731, China.
          [2 ] Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.
          [3 ] School of Physics, Beijing Institute of Technology, Beijing 100081, China.
          Article
          10.1021/acs.nanolett.0c02699
          32804512
          ac82e9fe-4252-43da-a67c-263641cfa736
          History

          Plasmonic vortex,spin-to-orbit coupling,surface plasmon polaritons,orbital angular momentum,plasmonic vortex lenses

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