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Tailoring Multidimensional Traps for Rewritable Multilevel Optical Data Storage.

Dong Liu, Lifang Yuan, Yahong Jin1

  • 1Department of Chemistry , The Hong Kong University of Science and Technology , Kowloon , Hong Kong 999077 , China.

ACS Applied Materials & Interfaces
|September 3, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a novel multidimensional optical data storage medium using optically stimulated luminescence (OSL). This breakthrough enables erasable, multilevel data recording and reading, significantly boosting storage capacity and offering high-security encryption.

Keywords:
optical data storageoptically stimulated luminescencesilicatessolid-state reactionstrap engineering

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Area of Science:

  • Materials Science
  • Data Storage Technologies
  • Optoelectronics

Background:

  • Current optical data storage (ODS) faces limitations in simultaneous single-level write-in and readout within the same spot.
  • The
  • big data
  • era necessitates advanced storage solutions beyond traditional methods.
  • Optically stimulated luminescence (OSL) offers potential for next-generation ODS but requires overcoming existing constraints.

Purpose of the Study:

  • To develop a novel, nonphysical multidimensional OSL-based ODS flexible medium.
  • To achieve erasable multilevel optical data recording and reading.
  • To bridge the data-capacity gap in current ODS technologies.

Main Methods:

  • Tailoring multidimensional traps with discrete energy levels via (multi-)codoping of trivalent rare-earth ions into Eu2+-activated barium orthosilicate (Ba2SiO4).
  • Sequential information recording in different traps using UV/blue light illumination and thermal cleaning.
  • Individual addressing of data without crosstalk using designed thermal/optical stimuli.

Main Results:

  • Demonstrated a significant increase in storage capacity by orders of magnitude.
  • Achieved rewritable multilevel optical data recording and reading with good data retention and fatigue resistance.
  • Verified individual addressability in whole domain or bit-by-bit modes without crosstalk.

Conclusions:

  • The developed OSL-based ODS medium provides a pathway to rewritable multilevel optical data storage.
  • The research offers insights into charge carrier dynamics for a universal data storage method.
  • Proof-of-concept applications highlight potential for high-security encryption/decryption.