Optical properties of chromium-doped fluoroindate glasses

Abstract

This work reports on the optical properties of Cr 3ϩ ions in the pseudoternary system InF 3 -GdF 3 -GaF 3 . Linear properties, investigated through absorption and emission spectra, provide information on the crystal field, the frequency, and number of phonons emitted during the absorption to the 4 T 2 band and the emission to the 4 A 2 ground state, and the Fano antiresonance line shape in the vicinity of the 4 A 2 → 2 E transition. A study of the nonlinear refractive index as a function of the wavelength, carried out with the Z-scan technique, provides spectroscopic data about electronic transitions starting from the excited state.

Molecular Properties Obtained by Analysis of Electronic Spectra Containing Interference Dips. Comparisons of Analytical Equations and Exact Models Based on Coupled Potential Energy Surfaces

“…1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] These dips are very common in the spectra of octahedral chromium(III) complexes where the narrow absorption bands arise from intraconfigurational transitions and the broad band from π* to σ* d-d transitions. The dips are found not only in the spectra of chromium-containing molecules but also in the spectra of crystals in which chromium is substituted for another ion in the lattice.…”

“…The dips are found not only in the spectra of chromium-containing molecules but also in the spectra of crystals in which chromium is substituted for another ion in the lattice. [4][5][6]8,10,11,14,16,[19][20][21] Spectra of other d 3 metal ions, especially those from vanadium(II), 3,9 also exhibit dips; the state energies in ions with this electron configuration are frequently close to each other, and the bands overlap to produce the effect. Dips are not limited to d 3 metal ions; examples are also found in the spectra of d 8 nickel compounds, 22 d 2 chromium(IV) ions doped into a crystal lattice with tetrahedral sites, 13 and d 4 manganese(III) ions doped into oxide lattices.…”

Transition metal (Cr3+) and rare earth (Eu3+, Dy3+) ions used as a spectroscopic probe in compositional-dependent lead borate glasses

“…This situation is observed for ZBLAN [13] and InF 3 [14] fluoride glasses. In another case (Dq/B 2.3), the Cr 3+ are exist in high-field sites.…”

“…Especially, spectral lines of Cr 3+ in oxide [10][11][12] and non-oxide [13][14][15] glasses were analyzed. The detailed study indicates that chromium ions can occupy low-field and high-field sites [16].…”

Influence of local structural disorders on spectroscopic properties of multi-component CaF2–Bi2O3–P2O5–B2O3 glass ceramics with Cr2O3 as nucleating agent

“…shoulder envelops at about 663 and 690 nm due to 4 A 2g → 2 T 1g and 4 A 2g → 2 E g transitions, respectively, could also be visualized in these spectra. These bands are due to spin forbidden transitions and may induce negative contribution to 4 A 2g → 4 T 2g (F) band [12]. With an increase in the concentration of nucleating agent Cr 2 O 3 , reduction in the intensity of the absorption peaks is observed with spectrally blue shift in the peak position.…”