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Paper   IPM / Physic / 15377
School of Physics
  Title:   Plasmon-phonon-polaritons in encapsulated phosphorene
1.  F. G. Ghamsari
2.  R. Asgari
  Status:   Published
  Journal: Plasmonics
  Vol.:  15(5)
  Year:  2020
  Pages:   1289-1304
  Supported by:  IPM
We consider a system consists of a doped monolayer phosphorne embedded between two semi-infinite hexagonal Boron Nitride (hBN) along the hetrostructure direction. The azimuthal angle dependence of the plasmon-polariton and plasmon phonon-polariton modes of the hybrid system are calculated based on the random phase approximation at finite temperature. The collective modes illustrate strong anisotropic and strong coupling with phonon modes of the polar media and furthermore, the Landau damping occurs due to the intraband processes when plasmon enters intraband electron-hole continuum. Our numerical results show that the plasmon mode is highly confined on the surface along the zigzag direction. Owing to the strong phonon-electron interaction, the phonon dispersions in the Reststrahlen bands are angle dependent.

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