Surface excitons and surface polaritons in the luminescence spectrum of xenon cryocrystals
O. N. GrigorashchenkoPhysicotechnical Institute on Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovE. V. SavchenkoPhysicotechnical Institute on Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovI. Ya. Fugol’Physicotechnical Institute on Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
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Using luminescence spectroscopy in xenon cryocrystals we have observed surface resonances due to Γ(3/2) excitons and Γ′(3/2) excitons in the bulk of the crystals and in the subsurface layer. For the dipole active transition from the Γ(3/2) band, the exciton–photon interaction is important. We analyze the properties of the luminescence spectra of thin and bulk samples of crystalline xenon in terms of a surface polariton model, and we explain the observed maxima in the emission.
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