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Photosensitive polymeric materials for two-photon 3D WORM optical data storage systems.

Ciceron O Yanez1, Carolina D Andrade, Sheng Yao

  • 1Department of Chemistry, University of Central Florida, Orlando, Florida 32816, USA.

ACS Applied Materials & Interfaces
|April 2, 2010
PubMed
Summary

Researchers developed a 3D optical data storage system using photochemistry and fluorescence. This nonlinear absorption system achieves high data density by utilizing two-photon absorption (2PA) for writing and fluorescence readout.

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Area of Science:

  • Photochemistry and Photophysics
  • Optical Data Storage
  • Materials Science

Background:

  • Existing optical data storage methods face limitations in density and speed.
  • Nonlinear absorption techniques offer potential for high-resolution 3D data recording.
  • Photoacid generators (PAGs) and fluorescent dyes are key components for optical switching.

Purpose of the Study:

  • To develop a fluorescence readout-based, nonlinear absorption 3D optical data storage system.
  • To investigate the photochemistry of photoacid generation and dye protonation for data writing and readout.
  • To evaluate the data storage capacity and layer crosstalk of the developed system.

Main Methods:

  • Utilized two-photon absorption (2PA) of photoacid generators (PAGs) at 710 or 730 nm for data writing.

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  • Employed fluorescence readout of protonated two-photon-absorbing dyes at 860 nm.
  • Performed photophysical characterization of PAGs and dyes, including spectral resolution and two-photon absorptivity.
  • Demonstrated two-photon recording and readout of voxels in a polymer matrix across multiple layers.

    • Main Results:

    • Achieved efficient acid generation upon 2PA of PAGs and subsequent dye protonation.
    • Demonstrated good spectral resolution between the PAG and protonated dye, minimizing crosstalk.
    • Recorded and read voxels in five and eight consecutive, crosstalk-free layers.
    • Attained a high data storage capacity of up to 1.8 x 10^13 bits/cm^3.

    Conclusions:

    • The developed system demonstrates a viable approach for high-density 3D optical data storage.
    • The photochemistry of PAGs and fluorescent dyes enables efficient and selective data writing and readout.
    • The system shows promise for future advancements in high-capacity data storage technologies.