Abstract
Characteristics essential for the readout durability of a superresolution near-field structure (super-RENS) disk are studied experimentally by using a home-built optical measuring setup and atomic force microscope, based on a simplified PtOx super-RENS disk. The experimental results show that for a super-RENS disk with constant structure and materials, readout signals including transmittance and reflectance vary with changes in bubble shape and size, indicating that the readout durability of the disk has a strong dependence on bubble stability, which is closely related to the thickness of the cover layer, the recording power and readout power, and the mechanical properties of the dielectric layer. Based on our experimental results, the main direction for improving readout durability is also proposed.
Highlights
Readout durability is one of the important factors for an optical disk
All R and T curves had a short plateau, which should obviously correspond to the stable state of the bubble; there was a dramatically change, which should indicate that the bubble, including the distribution of Pt nanoparticles within the bubble, had changed in size and shape
In an actual PtOx super-RENS disk, readout durability strongly depends on the bubble stability, which is influenced by recording and reading power, AIST layer thickness, and ZnSSiO2 as the dielectric layer
Summary
Readout durability is one of the important factors for an optical disk It relies on the material and structural system of a disk, and is related to recording and reading power. In the simplified super-RENS disk, only the AIST layer and the protection layer shown in Fig. 1(a) are omitted, so that the influence of the two layers can be removed from the total optical response and the transformation of the bubble surface can be observed microscopically. Based on our experimental results, some directions for improving readout durability will be proposed
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