Martínez Matos, ÓscarTorchia, Gustavo AdriánTocho, Jorge OmarKhaidukov, Nikolai Mikhailivich2023-06-202023-06-202004[1] R. Nevado, F. Cusso, G. Lifante, F. Caccavale, C. Sada, F. Segato, J. Appl. Phys. 88 (11(1)) (2000) 6183-6186. [2] D. Jaque, J. Capmany, J. García-Solé, A. Brenier, G. Boulon, Appl. Phys. B 70 (2000) 11-14. [3] E. Montoya, J. Capmany, L.E. Bausá, T. Kellner, A. Diening, G. Haber, Appl. Phys. Lett. 74 (21) (1999) 3113-3115. [4] R.E. Di Paolo, E. Cantelar, P.L. Pernas, G. Lifante, F. Cussó, Appl. Phys. Lett. 79 (2001) 4088. [5] H.N. Bordallo, R.H.W. Henning, L.P. Sosman, R.J.M. da Fonseca, A. Dias Tavares Jr., K.M. Hanif, G.F. Strouse, J. Chem. Phys. 115 (2001) 4300-4305. [6] L.P. Sosman, A.D. Raveres Jr., R.J.M. da Fonseca, T. Abritta, N.M. Khaidukov, Solid State Commun. 114 (2000) 661-665. [7] R.J.M. Da Fonseca, A.D. Tavares Jr., P.S. Silva, T. Abritta, N.M. Khaidukov, Solid State Commun. 110 (1999) 519-524. [8] U. Braunch, Q. Durr, Opt. Commun. 49 (1984) 61. [9] Y. Tanabe, S. Sugano, J. Phys. Soc. Jpn 9 (1954) 753. [10] S.J. Sugano, Y. Tanabe, H. Kamikura, Multiplets of Transitions Metals Ions in Crystals, Academic Press, New York, 1970. [11] P.A. Tanner, L. Yulong, N.M. Edelstein, K.M. Murdoch, N.M. Khaidukov, J. Phys. Condens. Matter 9 (1997) 7817. [12] B. Henderson, G.F. Imbush, Optical Spectroscopy of Inorganic Solids, Oxford Science Publications, Oxford, 1989. [13] G.A. Torchia, M.O. Martinez, P. Vaveliuk, J.O. Tocho, J. Phys.-Condens. Matter 13 (30) (2001) 6577-6583. [14] G.A. Torchia, D. Schinca, N.M. Khaudikov, J.O. Tocho, Opt. Mater. 20 (2002) 301-304.0038-109810.1016/j.ssc.2004.02.006https://hdl.handle.net/20.500.14352/51028© 2004 Elsevier Ltd.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.engjournal articlehttp://dx.doi.org/10.1016/j.ssc.2004.02.006http://www.sciencedirect.com/open access535Single-CrystalsLaserÓptica (Física)2209.19 Óptica Física