Reversible phase-change material high-density storage device

Abstract

The invention provides a reversible phase-change material high-density storage device based on a double beam super-resolution technology, which comprises a diffraction limited excitation light generation assembly, a suppression light generation module and an optical disk assembly, wherein the excitation light generation assembly is used for initiating optical recording; the central light strengthof the suppression light generation assembly is zero, and the suppression light generation assembly is used for suppressing optical recording; a recording layer of an optical disk in the optical diskassembly is formed by a semiconductor alloy phase-change material, and the phase-change material has reversible transformation between a crystalline phase and an amorphous phase under the action of laser light, so that the material is enabled to have corresponding reversible changes in reflectivity, refractive index and the like, and super-resolution recording for information can be realized; andlight-emitting ions are doped into the phase-change material, fluorescent light is emitted under the induction of excitation light with appropriate wavelength, and super-resolution reading of the recorded information can be realized. The reversible phase-change material high-density storage device and method based on the double beam super-resolution technology can realize a function of super-resolution reading and writing, and solve a problem that the storage capacity of the optical disk cannot be further improved due to the restriction of the diffraction limit.

Description

technical field [0001] The invention relates to the technical field of storage methods related to optical disc storage media, in particular to a high-density storage device for reversible phase-change materials based on double-beam super-resolution technology. Background technique [0002] After the birth of optical discs in the 1970s, with the continuous advancement of optical disc storage technology, the status of phase-change rewritable optical discs based on inorganic materials has become increasingly apparent. Phase-change optical discs use photo-thermal process to produce reversible phase transition between crystalline state and amorphous state of semiconductor alloy film, so as to achieve the purpose of writing, reading and erasing signals. [0003] The crystalline state of phase change materials is in the lowest position of Gibbs free energy, which is a stable state; the amorphous state is in a higher position of Gibbs free energy, which is a metastable state. When ...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a high-density storage device and method for reversible phase-change materials based on dual-beam super-resolution technology, which is used to solve the problem that cannot be achieved due to the constraints of the diffraction limit in the prior art. Continuing to improve the storage capacity of optical discs

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