Abstract
The property of the optical transmittance and reflectance induced by structural changes in AgOx, PtOx and PdOx thin films, which are materials of key layer in superresolution near-field structure (super-RENS) optical disk, is investigated by Z-scan measurements and microscopic observations. The light intensity features of the transmittance and reflectance are clarified. Laser-irradiated decomposition of the noble metal oxides in the films and their decomposition thresholds are examined. The optical properties of the films result from bubbles induced by the chemical decomposition of the oxides and the metallic nanoparticles dispersed in the bubbles. The light-induced thermal features, reversible and irreversible properties, optical responses corresponding to the decomposition of the oxides, the influence on readout stability, and the signal intensity of the metal-oxide (MeO) super-RENS disks are also discussed for MeO films.
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