Spectroscopic investigations on alkali earth bismuth borate glasses doped with CuO

Optical Spectroscopy and Excited‐State Dynamics of Eu3+‐Doped Bismuth Borate Glasses Containing CuO

“…Noticeably, the increase in CuO in the glasses results in the development of the broad absorption feature peaking around 715 nm due to d-d transitions in Cu 2 + (d 9 ) ions. [12,[15][16][17][18] The band is significantly red shifted compared to phosphate glasses where it has been observed around 850 nm, [12,18] and to some extent when compared to tellurite glass in the vicinity of 800 nm. [16] However, it is more typical of borate glasses that the Cu 2 + absorption band shows maxima below 800 nm in accord with an octahedral coordination supporting 2 E g !…”

“…2 T 2g transitions. [15,17] The concentration dependence of the intensity of this band at 715 nm is examined in the right inset of Figure 3. A linear relationship is observed (equation displayed in Figure 3), where a correlation coefficient r = 0.993 was obtained from the linear regression performed.…”

“…The value n = 2 connected to allowed-indirect transitions is usually employed in fitting the experimental results in glasses. [15,[18][19][20] Therefore, a plot of (Eα) 1/2 vs. photon energy (hν) may be used to estimate E opt from extrapolation of the linear portion of the plot and determination of the intercept on the energy axis. The plots corresponding to the glasses under consideration are shown in Figure 4.…”

Role of copper metal or oxide on physical properties of lithium borate glass

“…in the glass matrix [20] Urbach energy characterizes the extent of the exponential tail of the absorption edge. The exponential absorption tails and Urbach energy is given by relation [21] .…”

Spectroscopic investigations of Er3+:CdO–Bi2O3–B2O3 glasses

“…Bismuth borate glasses are one of the important classes of inorganic solids because of their properties, which include high refractive index, high physical and chemical stability, extensive glass formation range, long infrared cut‐off and high third‐order nonlinear optical susceptibility, low melting temperature, high density and high infrared transparency. They are used in the field of thermal and mechanical sensors, electro‐optic switches, solid‐state laser materials, photonic switches, reflecting windows, glass ceramics, and layers for optical and electronic devices . It is well known that B 2 O 3 is one of the most common glass network formers and is present in almost all important commercial glasses.…”