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Proceedings Paper

High-density multilayer recording of microgratings for optical data storage
Author(s): Susanna Orlic; Enrico Dietz; Sven Frohmann; Christian Mueller; Ruediger Schoen; Martin Trefzer; Hans J. Eichler
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Paper Abstract

A novel approach to 3D optical information storage based on writing and reading of microscopic holographic gratings in a photopolymer layer is presented. Strongly localized reflection gratings created by two highly focused laser beams are used to replace the pit and land structure of the CD/DVD technology. The holographic recording method presented here allows employing various multiplexing methods. A combination of wavelength multiplexing and multilayer storage is proposed to achieve storage densities similar to page-oriented holographic data storage. In this paper we report on recording and readout of submicron-sized gratings using diffraction limited laser beams. The transversal extent of a micrograting corresponds to the optical resolution limit. Track spacing and bit-to-bit separation are about 500 nm. The interlayer spacing through the depth of the photopolymer is less than 8 micron. This way a 3D structure is realized that even refines the surface data structure of current DVDs.

Paper Details

Date Published: 26 October 2004
PDF: 13 pages
Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); doi: 10.1117/12.563918
Show Author Affiliations
Susanna Orlic, Technische Univ. Berlin (Germany)
Enrico Dietz, Technische Univ. Berlin (Germany)
Sven Frohmann, Technische Univ. Berlin (Germany)
Christian Mueller, Technische Univ. Berlin (Germany)
Ruediger Schoen, Technische Univ. Berlin (Germany)
Martin Trefzer, Technische Univ. Berlin (Germany)
Hans J. Eichler, Technische Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 5521:
Organic Holographic Materials and Applications II
Klaus Meerholz, Editor(s)

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