Optical properties of single doped Cr3+ and co-doped Cr3+–Nd3+ aluminum tantalum tellurite glasses

EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

“…4 A 2 (F) emission that was fitted by three Gaussian curves at 13,600, 12,790, and 12,290 cm À1 (735, 782 and 814 nm) (Fig. 5), which is consistent since the 4 T 2 state is strongly coupled to lattice vibrations and therefore a nearly Gaussian shape is expected for each site [40,41]. Increasing the Cr 3+ concentration, the intensity of the band at 15,100 cm À1 almost vanishes while the intensity of the band centered at 12,790 cm À1 is greatly increased.…”

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

“…The luminescence band related to 4 T 2 -4 A 2 transition is divided into the red and the blue components, which indicates the coexistence of two different site distributions for Cr 3+ . Similar behavior was also observed for tellurite-based glasses [11]. The spectral deconvolution is presented in Fig.…”

“…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].…”

Influences of copper–potassium ion exchange process on the optical bandgaps and spectroscopic properties of Cr3+/Yb3+ co-doped in lanthanum aluminosilicate glasses

“…6,7 Chromium is a transition metal (TM) with many different valence states. [8][9][10] In the glass networks, it oen exists in the trivalent state Cr 3+ , [1][2][3][4][5]8 which can emit radiation in the visible (VIS), near-infrared (NIR) regions under different excitation wavelengths. 5,11,12 Also, the 4 T 1g (F) / 4 A 2g , 4 T 2g (F) / 4 A 2g , 2 T 1g / 4 A 2g , 2 T 2g / 4 A 2g and 2 E / 4 A 2g transitions of Cr 3+ can be combined with Yb 3+ to generate the VIS, NIR emission spectra.…”