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Thin amorphous As–S films were prepared using pulsed laser deposition. Raman scattering spectroscopy, variable angle spectroscopic ellipsometry, and optical transmittance spectra revealed irreversible photostructural effects, significant photoinduced changes of refractive index, and optical band gap energy in the films. Observed effects are discussed in terms of structural transformations of basic...
Pulsed laser deposition technique was employed for the preparation of amorphous As 4 Se 3 thin films. Raman scattering spectroscopy and variable angle spectroscopic ellipsometry results revealed reversible photostructural effects and metastable photorefraction in annealed films. Observed photoinduced effects are ascribed to reversible transformation of As 4 , As 4 Se...
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