Dependence of Chalcogenide Glassy Bi_x(As₂S₃)_100-x System Optical Parameters on the Doping Content

Photoinduced transformations in (As1–xBix)2S3 glass observed by Raman spectroscopy

“…A similar maximum was reported in earlier studies of (As 1– x Bi x ) 2 S 3 glasses from this compositional interval where X‐ray diffraction (XRD) studies did not show any sign of Bi 2 S 3 phase crystallisation 15,16 . Meanwhile, in an earlier study, 48 much narrower Bi 2 S 3 ‐related Raman features were clearly observed even for supposedly amorphous (As 1– x Bi x ) 2 S 3 samples at even lower Bi content (1.5 and 3 at. %).…”

“…44,45 The increasing intensity of the feature near 230 cm À1 (in particular, at the excitation in the green spectral range) is related to a structural transformation of As-rich As 4 S 4 structural groups from realgar to pararealgar structure. 46,47 It is worth noting that earlier Raman spectra of Bidoped As 2 S 3 glasses were studied in much narrower Bi content intervals using 532 nm 48,49 and 785 nm 16 excitation. In our case, addition of bismuth (x = 0.04-0.06) to the glass composition results in an additional clearly defined peak in the Raman spectrum appearing near 290 cm À1 (Figure 1).…”

“…One should also keep in mind that with the increase of Bi content in the samples, the optical absorption edge shifts towards longer wavelengths (the bandgap energy of the material decreases) and the absorption coefficient of the 532 nm laser light increases. 15,48 This factor can make the photoinduced effects in (As 1-x Bi x ) 2 S 3 even more pronounced than in the undoped As 2 S 3 .…”

“…It is worth noting that earlier Raman spectra of Bi‐doped As 2 S 3 glasses were studied in much narrower Bi content intervals using 532 nm 48,49 and 785 nm 16 excitation. In our case, addition of bismuth ( x = 0.04–0.06) to the glass composition results in an additional clearly defined peak in the Raman spectrum appearing near 290 cm −1 (Figure 1).…”

Effective Diagnostics of Internal Defects of Diamonds in the near Infrared Range on the Basis of Immersion Medium Made from Low-Melting Chalcogenide Glass

“…The causes of these processes are described in numerous publications [3][4][5][6]. In this work there is no task to explain these processes, but if the reader is interested, he can familiarize himself with the publication on this topic [6][7][8][9][10][11][12][13][14][15][16]. This article focuses on the practical use of chalcogenide amorphous material as a solid immersion medium for the study of precious stones.…”