Amorphous Chalcogenide Semiconductors and Related Materials

Electron beam-induced mass transport in As–Se thin films: compositional dependence and glass network topological effects

“…the materials, which include atoms of selenium, sulfur or tellurium, has grown enormously due to the strong interest in these materials from both the scientific and technological point of view [1][2][3]. Applications of ChGs have mainly been based on their transparency to infrared light (passive) and their sensitivity to different kind of irradiation (active).…”

Photoluminescence of As2S3 doped by Cr and Yb

“…The photoluminescence (PL) spectrum of arsenic chalcogenides when excited by light with ħω ≈ E g (E g is an optical bandgap energy) lies at about half the optical gap, which means that PL undergoes a strong Stokes shift, and it appears as a broad Gaussianshaped spectrum with a peak energy E PL approximately at E PL ≈ E g /2 [3][4][5]. Developments in photonics applications highlighted the chalcogenide glass as a host for rare-earth ions [1,[6][7][8][9].…”

Barrier–cluster–heating model and photoinduced phenomena in chalcogenide glasses

“…The glass is known to exhibit a variety of photoinduced effects [1][2][3][4][5][6][7]. The most famous may be the defect formation and radiation compaction in silica glasses which is now commercially utilized for producing Bragggrating fibres.…”

“…That is their disadvantage. The CHG (unlike to the oxide glass) has a band gap of 1-3 eV and flexible structures and accordingly, it exhibits many kinds of prominent photoinduced phenomena [1, [4][5][6][7][8][9][10]. These phenomena have been extensively studied during the last decades because of their potential applications, especially in optics and optoelectronics.…”

“…WATs arise according of BCH model with analogical mechanism as standard exponential tails, therefore in the consequence of energetical participation of phonons of optical origin on the optical absorption of photons of deficit energies [4][5][6][7]. The difference is only that in the case of standard exponential tails on the optical absorption shared "diffuse" phonons (phonons diffused through the whole volume of the sample) while in case of WAT on the optical absorption sharing phonons are released and concentrated in one nanoregion.…”