Phonon coupling of Cr3þ ions in Cs2NaAlF6 crystals

G.A. TORCHIA, O. MARTINEZ-MATOS, N.M. KHAIDUKOV AND J.O. TOCHO

SOLID STATE COMMUNICATIONS

Año: 2004 vol. 130 p. 159 - 163

0038-1098

We have studied the influence of the electron-lattice coupling on the luminescence quantum yield for Cr3þ ions in a Cs2NaAlF6 crystal. For this purpose, we analyze the absorption and emission spectra of Cr3þ ions by means of the configurational coordinate model in the harmonic approximation. We have found the energy of the breathing phonon associated to Cr3þ 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 Cr3þ:Cs2NaAlF6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700– 900 nm) spectral range3þ ions in a Cs2NaAlF6 crystal. For this purpose, we analyze the absorption and emission spectra of Cr3þ ions by means of the configurational coordinate model in the harmonic approximation. We have found the energy of the breathing phonon associated to Cr3þ 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 Cr3þ:Cs2NaAlF6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700– 900 nm) spectral range2NaAlF6 crystal. For this purpose, we analyze the absorption and emission spectra of Cr3þ ions by means of the configurational coordinate model in the harmonic approximation. We have found the energy of the breathing phonon associated to Cr3þ 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 Cr3þ:Cs2NaAlF6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700– 900 nm) spectral range3þ 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 Cr3þ:Cs2NaAlF6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700– 900 nm) spectral range3þ:Cs2NaAlF6 crystals promise to be a potential efficiency tunable laser device in the near infrared (700– 900 nm) spectral range