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Three-dimensional optical data storage using third-harmonic generation in silver zinc phosphate glass.
Lionel Canioni1, Matthieu Bellec, Arnaud Royon
1Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux 1, 33405 Talence Cedex, France.
Optics Letters
|February 19, 2008
Summary
We show 3D optical data storage in silver-doped zinc phosphate glass using femtosecond lasers. Information is written and read with third-harmonic generation (THG) imaging below the refractive index modification threshold.
Area of Science:
- Materials Science
- Optics
- Data Storage
Background:
- Optical data storage offers high density and speed.
- Developing novel materials and techniques is crucial for advancing storage capacity.
- Glass-based materials are promising for their stability and processability.
Purpose of the Study:
- To demonstrate 3D optical data storage in a novel glass material.
- To utilize third-harmonic generation (THG) for both writing and reading data.
- To investigate storage capabilities below the refractive index modification threshold.
Main Methods:
- Employing femtosecond laser irradiation for data encoding.
- Utilizing a specific silver-doped zinc phosphate glass as the storage medium.
- Implementing third-harmonic generation (THG) imaging for non-destructive readout.
Main Results:
- Successful demonstration of 3D optical data storage within the glass.
- Data encoding achieved by laser irradiation below the refractive index modification threshold.
- THG imaging confirmed as a viable readout method.
Conclusions:
- The silver-doped zinc phosphate glass is a suitable medium for 3D optical data storage.
- Femtosecond laser writing combined with THG readout is an effective technique.
- This method shows potential for high-density, stable optical memory.
