%0 Journal Article
%A Martínez Matos, Óscar
%A Torchia, Gustavo Adrián
%A Tocho, Jorge Omar
%A Khaidukov, Nikolai Mikhailivich
%T Phonon coupling of Cr^3^+ ions in Cs_2NaAlF_6 crystals.
%D 2004
%@ 0038-1098
%U https://hdl.handle.net/20.500.14352/51028
%X We have studied the influence of the electron-lattice coupling on the luminescence quantum yield for Cr^3^+ ions in a Cs_2NaAlF_6 crystal. For this purpose, we analyze the absorption and emission spectra of Cr^3^+ ions by means of the configurational coordinate model in the harmonic approximation. We have found the energy of the breathing phonon associated to Cr^3^+ ions in this host. In our findings we explain the high value of luminescence quantum yield reported previously (near to 70%), if we take into account the uncoupling between the breathing phonon and the normal modes associated to the bulk vibration. The Cr^3^+:Cs_2NaAlF_6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700–900 nm) spectral range.
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