Ga–Sb–S Chalcogenide Glasses for Mid‐Infrared Applications

Abstract

In this study, a novel chalcogenide glass system, Ga–Sb–S, is reported. The glass‐forming ability, the physical properties, and the structure are investigated; and the potential applications of the glasses are evaluated. The compositions consisting of ~3%–10% Ga, ~29%–37% Sb, and ~57%–63% S can form glasses. The glasses have a wide transparent window of ~0.8–14 μm, high linear refractive indices of ~2.62–2.70 (@10 μm), high third‐order nonlinear refractive indices of ~12.4 × 10−14 cm2/W (@ 1.55 μm), low phonon energy, and large rare earth solubility. These favorable properties make them promising materials for mid‐infrared applications such as thermal imaging, nonlinear optics, and lasers.

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

“…The radiative transition probability is calculated as 276 and 704 sec −1 , respectively37. While in Tm 3+ doped present GaSbS glass, the radiative transition probability of emission at 3.8 μm is about 500 sec −1  21. It shows that different rare earth ions in the same glass system presented on a different radiative transition probability.…”

“…Recent studies indicated that Ga-based Ga 2 S 3 –Sb 2 S 3 glass systems not only possess good thermal ability but also exhibit higher non-linear susceptibility and Raman gain coefficients, also including the RE (Dy 3+ /Tm 3+ )-doped infrared emissions21222324. In the current work, the Ga composition was tuned in the Sb–S glassy phosphors to find out the trade-off between glass structure and achieving efficient MIR emissions.…”

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.…”

Ga‐Sb‐S‐I chalcohalide glasses and fibers for mid‐infrared applications

“…Compared with Se and Te-based ChGes, S-based ones usually have higher power handling ability because of the stronger bonding strength between constituent elements. 1,13 Although the recently developed Ga-Sb-S glasses 14 exhibit remarkably wider IR transmission window and excellent rare-earth solubility, they suffer from crystallization during fiber drawing. However, most S-based ChG fibers have a relatively narrow IR transmission window of ~1-7 µm.…”