Five-dimensional (5D) recording and decoding is demonstrated by using femtosecond direct laser writing in a silver-containing commercial glass. In particular, laser intensities and ellipse orientations generated by anamorphic focusing are employed to produce 5D data storage unit (3D for XYZ, 1D for the orientation of the elliptically-shaped data storage unit and 1D for its fluorescence intensity). In the recording process, two different images of a 4-bit bitmap format were simultaneously embedded in the medium by multiplexing the elliptical orientation of the laser focus and its intensity so as to access oriented elliptical patterns with independent fluorescence intensity. In the decoding process, two merged original images were successfully reconstructed by comparing each data storage unit with a fabricated calibration matrix of 16 × 16 levels for elliptic orientations and fluorescence intensities. We believe this technique can be applied to semi-permanent high-density data storage device.
Bibliographical noteFunding Information:
Funding: This study has been carried out with financial support from French National Research Agency (ANR) in the frame of “the investments for the future” Programme IdEx Bordeaux—LAPHIA (ANR-10-IDEX-03-02) and ANR-19-CE08-0021-01, from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 82394, and from Pioneer Research Center Program (2013-004613) through the Ministry of Science, ICT and Future Planning, Korea.
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All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Mechanical Engineering
- Electrical and Electronic Engineering