One-shot optical disc with surface plasmon enhancement

Abstract

The invention discloses a disposable recording optical disc with a surface plasma enhancement effect. The optical disc structurally comprises an upper protective layer, a surface plasma enhanced recording layer, a lower protective layer and a disc base. The surface plasma enhanced recording layer has a double-layer structure consisting of a metal material and a recording material. After a writing laser pulse acts, recording points are formed by dispersing metal nanoparticles in the recording material in the surface plasma enhanced recording layer. A local area surface plasma enhancement effect can be achieved around the metal nanoparticles in the recording points to realize the write and the read of the recording points lower than a diffraction limit, so that the storage capacity of the disposable recording optical disc is improved. The surface plasma enhanced recording layer also has functions of an information recording layer, a super-resolution reading layer and a reflecting layer, so that the film layer structure of the optical disc can be effectively simplified.

Description

technical field [0001] The invention relates to an optical disc, in particular to a record-once optical disc with surface plasmon enhancement effect. Background technique [0002] With the rapid development of information technology, especially the development and popularization of digital high-definition film and television technology and network technology, the amount of information has increased sharply, and the requirements for storage density and capacity of optical disc storage have continued to increase. The most direct way to increase the density and capacity of an optical disc is to reduce the size of a single recording bit (recording point). Like other types of optical discs, by reducing the laser wavelength and increasing the numerical aperture of the objective lens, the one-time recording optical disc has also experienced three generations of CD, DVD and Blu-ray BD. The single-sided storage capacity has increased from 650MB of CD and 4.7GB of DVD to that of Blu-r...

AI Technical Summary

Problems solved by technology

Similar to other types of optical discs, when the super-resolution near-field structure is applied to a recording optical disc, in addition to the super-resolution functional layer, there are separate recording layers, reflective layers and supporting multi-layer dielectric layers, etc., making the super-resolution near-field structure The film structure of optical discs becomes complex

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