Effect of gallium environment on infrared emission in Er3+-doped gallium– antimony– sulfur glasses

Abstract

Gallium-based Ga–Sb–S sulfide glasses was elaborated and studied. A relationship between the structure, composition, and optical properties of the glass has been established. The effects of the introduction of Ga on the structure using infrared and Raman spectroscopies and on the Er3+-doped IR emission have been discussed. The results show that incorporation of Ga induced the dissociation of [SbS3] pyramids units and the formation of tetrahedral [GaS4] units. The dissolved rare earth ions are separated around the Ga–S bonding and the infrared emission quenching are controlled. Moreover, continuous introduction of Er ions into the glass forms more Er–S bonds through the further aggregation surrounding the [GaS4] units. In return, the infrared emission intensity decreased with excessive Er ion addition. This phenomenon is correlated with the recurrence concentration quenching effect induced by the increase of [GaS4] units.

Formation, Microstructure, and Conductivity of a Novel Ga2S3-Sb2S3-AgI Chalcogenide System

“…According to previous research on 80Sb 2 S 3 -20Ga 2 S 3 glass, the broad overlapping peak at about 300 cm −1 is assigned to the [SbS 3 ] pyramid (290 and 314 cm −1 ), the shoulder around 138, 342, and 265 cm −1 to the [GaS 4 ] tetrahedral structure units, and the [S 3 Ga-GaS 3 ] ethane-like unit. 17,29 Gallium tends to be coordinated with sulfur in chalcogenide glasses in fourfold; consequently, [S 3 Ga-GaS 3 ] ethane-like units form to compensate for the shortage of sulfur in the 80Sb 2 S 3 -20Ga 2 S 3 glass 9 . Metal halides, such as AgI, function as a glassy network terminator.…”

“…Adding AgI to sulfide glasses can also enhance their glass-forming ability and non-linear properties 16 . Therefore, to improve the glass-forming ability and to find new optic materials and chalcogenide solid electrolytes with high Ag + ionic conductivity, we investigated a series of Ga 2 S 3 -Sb 2 S 3 glasses, which exhibit good glass-forming ability and properties 17,18 .…”

Ge-free chalcogenide glasses based on Ga-Sb-Se and their stabilization by iodine incorporation

“…In fact, it is possible to estimate a de-crosslinking of the long Se chains by terminal iodine atoms leading to a less distributed distribution of vibration and therefore better defined peaks around 235cm -1 . Even if Ga-Ga bonds are not clearly identified, the possibility to incorporate iodine within ethane like GaSe3-GaSe3 units leading to a growing peak around 180cm -1 cannot be excluded [3].…”

“…More recently, Jiao et al [3,4] worked on the analogous sulfide system showing a good ability to form glass with gallium and antimony entities. The substitution of sulfur by selenium is known to strongly broaden the transmission window in the infrared range permitting to take the full benefit of the third atmospheric window ranging from 8 to 14μm.…”

Compositional dependence of the optical properties of novel Ga–Sb–S–XI (XI = PbI2, CsI, AgI) infrared chalcogenide glasses

“…Thus, metal-iodines can obtain a high second-order or third-order nonlinearity. 14 Recently, a novel chalcogenide glass system Ga-Sb-S was developed by Zhang et al [15][16][17] This glass system exhibits a much lower phonon energy than those of Ge-or As-based glasses. 17 Nevertheless, no work has comprehensively studied the influence of metal halides on the structure and properties of Ga-Sb-S chalcogenide glasses.…”