Infrared structural studies of GeySe1−y glasses

Bulk and thin-film specimens of GeySe1−y have been made the range 0 < y < 0.50. Transmission and reflectivity measurements at 77 and 300 K are reported in the range 50–400 cm−1. Mode assignment are made and an analysis is presented which supports the chain crossing model for y<0.33. The origin of several small spectral features is discussed in terms of crystal-like stacking within a volume of characterization dimension 10–20 A.