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Advances in protein-based three-dimensional optical memories

Z Chen1, D Govender, R Gross

  • 1W. M. Keck Center for Molecular Electronics, Syracuse University, NY 13244, USA.

Bio Systems
|January 1, 1995
PubMed
Summary
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Oriented bacteriorhodopsin cubes show promise for 3D optical memory. Researchers demonstrated write/read capabilities using two-photon absorption, detecting photovoltage in large bacteriorhodopsin (BR) cubes.

Area of Science:

  • Biophysics
  • Materials Science
  • Optical Engineering

Background:

  • Bacteriorhodopsin (BR) is a light-activated protein with potential for data storage.
  • Three-dimensional (3D) optical memory offers high storage density.
  • Developing stable, large-scale 3D optical memory media is an ongoing challenge.

Purpose of the Study:

  • To optimize an oriented bacteriorhodopsin cube as a 3D optical memory medium.
  • To demonstrate and evaluate the write/read capabilities of this protein-based memory system.

Main Methods:

  • Utilizing two-photon absorption to induce a photovoltaic signal for data writing and reading.
  • Fabricating and testing oriented bacteriorhodopsin cubes up to 1.6 x 1.6 x 1.6 cm³.
  • Analyzing read/write speeds, signal-to-noise ratio, and laser damage thresholds.

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Main Results:

  • Successful demonstration of write/read functionality in a 3D bacteriorhodopsin optical memory cube.
  • Detection of a two-photon induced photovoltage within the BR cube.
  • Characterization of key performance metrics including speed, signal quality, and material durability.

Conclusions:

  • Oriented bacteriorhodopsin cubes are viable candidates for 3D optical data storage.
  • The demonstrated photovoltaic signal mechanism supports the feasibility of protein-based optical memory.
  • Further investigation into performance parameters can optimize BR for practical optical memory applications.