Abstract
Sb 2Se 3 films are synthesized by CW-Ar + laser irradiation of a sandwich stack of elemental layers. The atomic proportion in the stack is closest to the aimed stoichiometry. Time-resolved reflectivity measurements are performed to determine the kinetics of the phase formation at fixed laser power values. Two steps of transformation are observed at and above a given power value. At first, reflectivity decreases due to the interdiffusion of Sb and Se without interatomic reaction. Then, it increases and saturates following the synthesis and crystallization of a so-formed Sb 2Se 3 homogeneous film. At low power densities, the sandwich stack is not transformed homogeneously the whole depth. All irradiated films are analyzed with optical and X-ray photoelectron spectroscopies. Given the good optical reflectivity contrast between virgin and synthesized material, possible application of Sb 2Se 3 in optical WORM recording is discussed.
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