Abstract
A novel metallized azo dye has been synthesized. Theabsorption spectra of the thin film and thermal characteristic aremeasured. Static optical recording properties with and without the Bimask layer super-resolution near-field structure (Super-RENS) of themetal-azo dye are investigated. The results show that the metal-azo dyefilm has a broad absorbance band in the region of 450–650 nm and themaximum absorbance wavelength is located at 603 nm. It is also foundthat the new metallized azo dye occupies excellent thermal stability,initiatory decomposition temperature is at 270°C and the mass loss isabout 48% in a narrow temperature region (15°C). The complexrefractive index N (N = n+ik) is measured. High refractiveindex (n = 2.45) and low extinction coefficient (k = 0.2) atthe recording wavelength 650 nm are attained. Static optical recordingtests with and without Super-RENS are carried out using a 650 nmsemiconductor diode laser with recording power of 7 mW and laser pulseduration of 200 ns. The AFM images show that the diameter of recordingmark on the dye film with the Bi mask layer is reduced about 42%,compared to that of recorded mark on the dye film without Super-RENS.It is indicated that Bi can well performed as a mask layer of the dyerecording layer and the metallized azo dye can be a promising candidatefor recording media with the super-resolution near-field structure.
Published Version
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