The two-photon excitation line shapes of f-f transitions of Eu2+ in KMgF3 have been investigated as a function of temperature. Results for several transition lines of the P-6(J) and D-6(J) multiplets are presented in this work. The two-photon excited transitions appear as zero-phonon lines with a Lorentzian profile whose peak energy is shifted from the zero temperature position. The observed temperature dependence of the zero-phonon line shapes is ascribed to the elastic scattering of the electronic transitions among vibrational states via anharmonic coupling to a phonon mode of the lattice heat-bath. In those components of 4f(7) multiplets whose energies are not resonant with the 4f(6)5d broad excited state, a direct proportionality to the phonon occupation number of the coupled mode is found for the line-shapes and peak-positions temperature dependences.

Francini, R., & Grassano, U. (1999). Temperature dependence of the line shapes of two-photon excited transitions in KMgF3 : Eu2+. In Radiation Effects and Defects in Solids (pp.13-17). READING : Gordon Breach Sci Publ Inc, Reading, United Kingdom.

Temperature dependence of the line shapes of two-photon excited transitions in KMgF3 : Eu2+

FRANCINI, ROBERTO;
1999

Abstract

The two-photon excitation line shapes of f-f transitions of Eu2+ in KMgF3 have been investigated as a function of temperature. Results for several transition lines of the P-6(J) and D-6(J) multiplets are presented in this work. The two-photon excited transitions appear as zero-phonon lines with a Lorentzian profile whose peak energy is shifted from the zero temperature position. The observed temperature dependence of the zero-phonon line shapes is ascribed to the elastic scattering of the electronic transitions among vibrational states via anharmonic coupling to a phonon mode of the lattice heat-bath. In those components of 4f(7) multiplets whose energies are not resonant with the 4f(6)5d broad excited state, a direct proportionality to the phonon occupation number of the coupled mode is found for the line-shapes and peak-positions temperature dependences.
8th Europhysical Conference on Defects in Insulating Materials (EURODIM98)
Keele, UK
JUL 06-11, 1998
Rilevanza internazionale
Settore FIS/03 - Fisica della Materia
English
Crystal impurities; Doping (additives); Electron scattering; Electron spectroscopy; Electron transitions; Lattice vibrations; Phonons; Photons; Potassium compounds; Temperature; Elastic scattering; Lorentzian profile; Two photon spectroscopy; Europium compounds
Intervento a convegno
Francini, R., & Grassano, U. (1999). Temperature dependence of the line shapes of two-photon excited transitions in KMgF3 : Eu2+. In Radiation Effects and Defects in Solids (pp.13-17). READING : Gordon Breach Sci Publ Inc, Reading, United Kingdom.
Francini, R; Grassano, U
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/44813
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