Guided Wave Mode of the Surface Exciton Polariton in Anthracene Crystal

  • Nozue Yasuo
    Department of Physics, Faculty of Science, Tohoku University
  • Kawaharada Miho
    Department of Physics, Faculty of Science, Tohoku University
  • Goto Takenari
    Department of Physics, Faculty of Science, Tohoku University

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タイトル別名
  • Guided Wave Mode of the Surface Exciton

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The stable solution of the TE-guided wave mode (TE–GWM) of the surface exciton polariton is obtained in the (001)-surface of anthracene crystal. The luminescence band observed around the surface exciton energy is ascribed to the radiative decay of the TE–GWM. The peak energy and the large width of this band are interpreted by the calculated dispersion curve of the TE–GWM. The incoming and outgoing resonances are observed in the Raman scattering by a surface phonon. The Raman line energy at the outgoing resonance coincides with the energy of the TE–GWM. The outgoing resonance is interpreted by the model of the TE–GWM. The luminescence structure observed below the surface exciton energy is assigned to the side-band of the TE–GWM associated with the emission of the surface phonon.

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