New evidence of light-induced structural changes detected in As–S glasses by photon energy dependent Raman spectroscopy

Ab initio calculations and the effect of atomic substitution in the Raman spectra of As(Sb,Bi)2S3 films

“…Light induced structural modifications were also probed all of the studied films by micro-Raman spectroscopy. It was found that the photo-induced structural transformations in As 2 S 3 films are very similar to those observed and described by us earlier for glassy arsenic trisulphide [12,16]. No significant laser-induced effects were observed in the microstructure of Sb 2 S 3 films.…”

“…1a) correspond to symmetric and antisymmetric vibrations of AsS 3 pyramids, respectively [10]. The other peaks seen in the spectra at 230, 370, 360, and 490 cm -1 are related to vibrations of molecular-like As-S clusters and S-S bonds [11,12].…”

Comparison of structural transforma‐ tions in bulk and as‐evaporated optical media under action of polychromatic or photon‐energy dependent monochromatic illumination

“…2 indicate the realgar-pararealgar transformation during illumination of the sample by laser, which was also supported by DFT calculations [4][5][6][7]13]. Similar transformation was also found in differential Raman spectra of stoichiometric As 40 S 60 glass composition [4]. For detail analysis and comparisons of the processes of photo-induced structural changes in As-S glass and film we used differential Raman spectra of Ar-rich samples (Fig.4, curves b and c).…”

Monitoring structural phase transition of (Ge2S3)x(As2S3)1−x chalcogenide glass with Raman spectroscopy

“…There are also indications of GeS crystalline vibrational modes at 213 cm À1 and 242 cm À1 [24]. The broad band in the higher spectral region is composed of the Raman active vibrational modes of AsS 3 pyramids at 310 and 340 cm À1 [14,16,17], the vibrational mode of As 4 S 4 at 360 cm À1 [26,27] and GeS 4 tetrahedrons at 345, 370 and 430 cm À1 [18,23,24,28].…”