Strong plasmonic confinement and optical force in phosphorene pairs

Hua Lu, Yongkang Gong, Dong Mao, Xuetao Gan, Jianlin Zhao

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Abstract

The plasmonic responses in the spatially separated phosphorene (single-layer black phosphorus) pairs are investigated, mainly containing the field enhancement, light confinement, and optical force. It is found that the strong anisotropic dispersion of black phosphorus gives rise to the direction-dependent symmetric and anti-symmetric plasmonic modes. Our results demonstrate that the symmetrical modes possess stronger field enhancement, higher light confinement, and larger optical force than the anti-symmetric modes in the nanoscale structures. Especially, the light confinement ratio and optical force for the symmetric mode along the armchair direction of black phosphorus can reach as high as >90% and >3000 pN/mW, respectively. These results may open a new door for the light manipulation at nanoscale and the design of black phosphorus based photonic devices. (C) 2017 Optical Society of America

Original languageEnglish
Pages (from-to)5255-5263
Number of pages9
JournalOptics Express
Volume25
Issue number5
DOIs
Publication statusPublished - 6 Mar 2017

Keywords

  • SLOT WAVE-GUIDES
  • BLACK PHOSPHORUS
  • HYPERBOLIC METAMATERIALS
  • GRAPHENE PLASMONICS
  • SURFACE-PLASMONS
  • LIGHT
  • POLARITONS
  • PHOTODETECTOR

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