The structure and optical properties of GeO2–GeS2 glasses

Processing and characterization of new oxysulfide glasses in the Ge–Ga–As–S–O system

“…Kim et al [6] have shown that germanium oxysulfide glasses can be prepared in the system (1Àx)GeS 2 -xGeO 2 for 0oxo1, by rapidly quenching melts to room temperature with no evidence of phase separation across the entire compositional range. However, recently, Terakado et al explained that the Ge:S ratio can deviate from GeS 2 by $10 at%, depending critically upon the preparation conditions [7]. The oxysulfide glasses in the system GeS 2 -GeO 2 , elaborated using melt quench technique, have been proposed to be heterogeneous over a nanoscale due to phase separation phenomenon [7].…”

Structural and physical characteristics of CeO2–GeO2–PbO glasses and glass ceramics

“…The positions of the most important absorption bands evidenced in the FT-IR spectra and their assignments are summarized in Table 1. The assignments were made based on data from the literature concerning some related vitreous or crystalline compounds [19][20][21][22][23][24][25][26][27][28][29].…”

Ag‐photodoping in nano‐structured GeO2‐GeS2 glasses

“…For such purposes, an oxy-chalcogenide glass is one of much interest, since the glass contains characteristically different ionic and covalent bonds. The bonds may produce homogeneous mixed structures [1] or heterogeneous phase-separated structures [2,3], which remains controversial. If the structure is heterogeneous, the two kinds of bonds may build into nano-scale clusters having wide (> 5 eV) and medium (2-3 eV) band-gaps.…”

“…The phenomenon is characteristic of the chalcogenide glass, and accordingly, the composition dependence will provide an insight into microscopic structures in the oxy-chalcogenide glass [3].…”

“…Chemical composition of the glasses was examined in the previous study, and stoichiometric samples, the socalled "yellow" in Ref. [3], were employed in the present study.…”