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

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

“…The glass synthesis and sample preparation were conducted Table 2 Comparison of band frequencies/band locations related to the Ce(IV) valence state in cerium-doped glasses according to [7,[9][10][11]. with methods described in detail in [1]. Polished samples 0.2-0.3 mm thick were prepared for recording the UV absorption spectra.…”

“…The given paper is the second one in a series of papers to be published under the above general collective title, Quantitative UV-VIS spectroscopic studies of photo-thermo-refractive glasses, the series having been opened up recently by [1].…”

“…According to the sequence of studies proposed in [1], the next steps to be performed are the investigation of the spectroscopic behavior of all valence states of each dopant such as Ce, Ag, and Sb in the virgin PTR matrix glass samples. 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…”

“…is the starting point for the all the rest electronic processes that occur in PTR glasses under the effects of the UV irradiation and subsequent heat treatment (for a general scheme of these processes, see, for example, [1]). Therefore, the spectroscopy of Ce 3+ and Ce(IV) valence states 1 in PTR glass matrices is of utmost importance for understanding these processes, which makes it expedient to begin the investigation of the dopant spectra with those of cerium.…”

“…The dispersion analysis version used in [7] was specially adapted, as described in [1], to processing spectra in the UV. The absorption envelopes related to the Ce 3+ and Ce(IV) valence states were shown to be formed by three individual bands each.…”