“…Note that earlier Raman studies of the amorphous As–Se–S systems in most cases presented data for the end‐point compounds and only one intermediate composition, [ 10,11,14 ] while a more detailed compositional behavior upon chalcogen substitution was analyzed in a quite limited number of studies for stoichiometric [ 13,17,57 ] and non‐stoichiometric [ 13,57 ] As–Se–S bulk glasses and thermally evaporated thin films. [ 15,16 ] The compositional behavior illustrated by Fig. 2 is in a good agreement with earlier data for stoichiometric As–Se–S bulk glasses [ 13,58 ] and thermally evaporated amorphous ternary As–Se–S films, the structure of which was relaxed by exposure to halogen lamp illumination.…”