Readout Characteristics and Mechanism of Light-Scattering-Mode Super-RENS Disks
NATIONAL INSTITUTE FOR ADVANCED INTERDISCIPLINARY RESEARCH TSUKUBA (JAPAN)
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Readout characteristics of light-scattering-mode super-resolution near-field structure super-RENS disks are described in detail. Readout intensities in reflected and transmitted signals are compared. Both signals showed mostly the same carrier-to-noise ratios CNRs using objective lenses with NA of 0.6. The formation mechanism of light scattering centers in the super-RENS disks is also described in comparison with several different disks. As increasing oxygen ratio during the deposition of silver oxide AgOx layers, two different chemical reactions were identified. It was found that the super-RENS disks with oxygen-rich AgOx films have both characteristics of transparent and light-scattering apertures in one disk. Further study also revealed that the AgOx dynamic nonlinearity is not so high and less than 6 by the film itself however, it is enhanced to 12 in super-RENS. It is supposed that the imaginary refractive index kappa of the films is less than 0.1 therefore, it is hard to heat itself to the decomposition temperature without a heat source GeSbTe film underneath. This result would be a hint to further increase CNRs in a light-scattering-mode super-RENS disks.
- Computer Systems
- Electricity and Magnetism