title: Coherent Light Photo-modification, Mass Transport Effect, and Surface Relief Formation in AsxS100-xNanolayers: Absorption Edge, XPS, and Raman Spectroscopy Combined with Profilometry Study.
abstract: AsxS100-x(x = 40, 45, 50) thin films top surface nanolayers affected by green (532 nm) diode laser illumination have been studied by high-resolution X-ray photoelectron spectroscopy, Raman spectroscopy, optical spectroscopy, and surface profilometry. It is shown that the composition of obtained films depends not only on the composition of the source material but as well on the composition of the vapor during the evaporation process. Near-bandgap laser light decreases both As-As and S-S homopolar bonds in films, obtained from thermal evaporation of the As40S60and As50S50glasses. Although As45S55composition demonstrates increasing of As-As bonds despite to the partial disappearance of S-S bonds, for explanation of this phenomenon Raman investigations has also been performed. It is shown that As4S3structural units (s.u.) responsible for the observed effect. Laser light induced surface topology of the As45S55film has been recorded by 2D profilometer.
authors.affiliation: Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine. o.b.kondrat@gmail.com.
authors.forename: O
authors.initials: O
authors.lastname: Kondrat
authors.affiliation: Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine.
authors.forename: R
authors.initials: R
authors.lastname: Holomb
authors.affiliation: Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, H-4001, Hungary.
authors.forename: A
authors.initials: A
authors.lastname: Csik
authors.affiliation: Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, H-4001, Hungary.
authors.forename: V
authors.initials: V
authors.lastname: Takáts
authors.affiliation: Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, 1121, Hungary.
authors.forename: M
authors.initials: M
authors.lastname: Veres
authors.affiliation: Uzhhorod National University, Pidhirna Str. 46, Uzhhorod, 88000, Ukraine.
authors.forename: V
authors.initials: V
authors.lastname: Mitsa
keywords: As-S nanolayers; Chalcogenide thin films; Core level; Mass transport; Photoinduced changes; Raman spectroscopy; Valence band; XPS