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    Multiplexing optical data storage boosts capacity, but slow single-bit reading limits throughput. A new interference-aided method reads multiple bits simultaneously, enhancing optical data storage speeds.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Data Storage Technologies

    Background:

    • Multiplexing techniques enhance optical data storage capacity.
    • Current readout speeds are bottlenecked by single-bit reading processes.

    Purpose of the Study:

    • To develop a fast readout method for multidimensional optical data storage.
    • To enable simultaneous multi-bit information retrieval.

    Main Methods:

    • Utilized interference-aided reflectance spectral measurement for data readout.
    • Recorded multidimensional data in a photoresist layer on a dielectric multilayer substrate via laser direct writing.
    • Engineered an internal interference layer to correlate recording layer thickness with spectral peak shifts.

    Main Results:

    • Successfully demonstrated simultaneous readout of 2-bit and 3-bit unit information with a single exposure.
    • Established a relationship between recording layer thickness and reflected spectra peak shift.

    Conclusions:

    • The proposed fast readout method significantly improves data retrieval efficiency.
    • This technique is applicable to existing optical data storage (e.g., Blu-ray) and super-resolution systems.