Optical storage medium and super-resolution information reading and writing method and device based on the medium

By using dual-beam wavelength laser and stimulated radiation loss microscopy technology in optical storage media, super-resolution information writing and reading are achieved, solving the limitations of recording point size and storage capacity in optical storage, and achieving high-density three-dimensional optical storage.

CN117831587BActive Publication Date: 2025-03-18SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202311672209.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-07
Publication Date
2025-03-18
Estimated Expiration
2043-12-07

AI Technical Summary

Technical Problem

The existing optical storage technology is limited by the optical diffraction limit, and cannot further reduce the size of the recording point, resulting in a low total storage capacity and limited increase in the number of three-dimensional recording layers, which cannot greatly increase the total storage capacity.

Method used

An optical storage medium is adopted, whose components include photoinitiators, monomers, metal ion compounds and aggregation-induced luminescent dyes. Through super-resolved writing of a dual-beam wavelength laser and super-resolved reading based on the principles of stimulated radiation loss microscopy technology, the size of the information recording point is smaller than the diffraction limit and the number of stored recording layers is increased.

Benefits of technology

It effectively solves the problem that single point size and channel spacing in optical storage are limited by optical diffraction limits, realizes high-density three-dimensional optical storage, and improves storage capacity and density.

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Abstract

Optical storage medium and super-resolution information reading and writing method and device based on the medium. Optical storage medium, each component accounts for 0.1% to 5% of the molar amount of the material: photoinitiator is 0.1% to 5%, aggregation-induced luminescence dye is 0.1% to 5%, metal ion compound is 0.1% to 5%, and monomer is 85% to 99.7%. The information writing method includes: using a solid light beam of wavelength λ1 to irradiate the optical storage medium, so that the irradiated area produces enhanced fluorescence intensity; using a hollow light beam of wavelength λ2 to irradiate the surrounding area of ​​the solid light beam irradiation area, so that the surrounding area suppresses the fluorescence intensity; using the fluorescence contrast between the irradiated area and the surrounding area to record information, forming an information recording point with a size smaller than the diffraction limit. The super-resolution writing of the present invention and the super-resolution reading based on stimulated emission depletion microscopy solve the problems that traditional reading and writing methods cannot break through the diffraction limit, the material transmittance is low, and the number of three-dimensional recording layers is limited, greatly improving the optical storage density and capacity.
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