Title :
Nonequilibrium vibronic states of Cr ions in Mg/sub 2/GeO/sub 4/ studied by upconverted hot luminescence laser spectroscopy
Author :
Demos, Stavros G. ; Petricevic, V. ; Alfano, Robert R.
Abstract :
Summary form only given. Following photoexcitation of an impurity ion in a crystal, phonons are emitted associated with the nonradiative energy transfer from "hot" ion into the lattice environment. The nonequilibrium vibronic states populated during the nonradiative relaxation of Cr/sup 4+/ impurity ions in Mg/sub 2/GeO/sub 4/:Cr/sup 4+/ were measured using upconverted hot luminescence to obtain information on the phonon modes and electronic bottlenecks involved.
Keywords :
chromium; hot carriers; impurities; impurity absorption spectra; magnesium compounds; phonon spectra; phonons; photoexcitation; photoluminescence; vibrational modes; Cr ions; Cr/sup 4+/ impurity ions; Mg/sub 2/GeO/sub 4/; Mg/sub 2/GeO/sub 4/:Cr; crystal; electronic bottlenecks; impurity ion; lattice environment; nonequilibrium vibronic states; nonradiative energy transfer; nonradiative relaxation; phonon emission; phonon modes; photoexcitation; upconverted hot luminescence; upconverted hot luminescence laser spectroscopy; Chromium; Gallium arsenide; Impurities; Laser excitation; Laser theory; Luminescence; Phonons; Photonic crystals; Physics; Spectroscopy;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1996. QELS '96., Summaries of Papers Presented at the
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-444-0
