Spectral components that form UV absorption spectrum of Ce3+ and Ce(IV) valence states in matrix of photothermorefractive glasses

Quantitative UV–VIS spectroscopic studies of photo-thermo-refractive glasses. I. Intrinsic, bromine-related, and impurity-related UV absorption in photo-thermo-refractive glass matrices

“…There are three sources [31][32][33] only by now (the third one being in press yet) presenting the UV spectra of such samples.…”

“…Therefore, the use of the refractive index data in the near IR-VIS-near UV regions can allow one to represent the contributions of the intrinsic VUV spectral features to the complex dielectric function in the 28,500 to 50,000 cm -1 region with some effective oscillators and to compute the oscillator parameter magnitudes. This approach was first tested in [31] and then used successfully in [33].…”

“…As in [33], the intrinsic absorption tail was represented in the course of processing with a series of the VUV effective oscillators.…”

Quantitative UV–VIS spectroscopic studies of photo-thermo-refractive glasses. II. Manifestations of Ce3+ and Ce(IV) valence states in the UV absorption spectrum of cerium-doped photo-thermo-refractive matrix glasses

“…As to the Ce(IV)-related absorption, vague theoretical considerations available for the charge transfer phenomenon (see, for example, [15]) do not allow for clearing whether only a single charge transfer band or several charge transfer components can occur. Moreover, as indicated in [7], the very idea of assigning the Ce(IV)-related absorption to the charge transfer arouses certain doubts.…”

“…A principal dopant to be investigated first is cerium because the well-known (see, for example, [2][3][4][5][6] and also a review in [7]) phenomenon of the Ce 3+ ion photosensitivity represented by reaction…”