TITLE

A photopolymerizable glass with diffraction efficiency near 100% for holographic storage

AUTHOR(S)
Cheben, Pavel; Calvo, María L.
PUB. DATE
March 2001
SOURCE
Applied Physics Letters;3/12/2001, Vol. 78 Issue 11, p1490
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Permanent holographic storage has been demonstrated in a photopolymerizable organically modified silica glass. The glass was prepared by dispersing a titanocene photoinitiator and a high refractive index acrylic monomer in a porous silica matrix. This glass exhibits unprecedented sensitivity and refractive index change upon a moderate exposure to green light and can be fabricated in thickness up to several millimeters. A photopolymerizable storage medium of such a thickness with good holographic properties is needed for practical holographic storage devices. Lack of such medium has been considered the main obstacle in development of write-once holographic memories. In our glass, we have stored permanent volume holograms of diffraction efficiency approaching 100% and refractive index modulation up to 4.5x10[sup -3], making this photopolymerizable material suitable for use in holographic data storage. © 2001 American Institute of Physics.
ACCESSION #
4715133

 

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