Loosing Energy Mechanism of the Optically Excited F Centers in KCl

概要

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The loosing energy mechanism of the optically excited states (OES) of the F center in KCl has been investigated by the measurement of resonant secondary radiation (RSR) caused by its resonant excitation with either continuous wave (cw) or picosecond (ps) pulse laser. The sepctrum of the RSR intensity and its linear polarization are observed as a function of the wavenumber over the Stokes range. They are examined semi-classically and quantum mecahnically based on a realistic vibronic scheme. As a result, the de-excitation mechanism of the OES has been clarified from fitting analysis of the experimenal data, the lattice relaxation time, τ_ι, of the OES are estimated to be in the order of 10^<-13> sec. From the time-resolved ps spectroscopy of RSR, a revised configuration coordinate scheme of de-exitaiton of the OES is proposd qualitatively.
岡山理科大学の論文