High-density multilayer recording of microgratings for optical data storage

Susanna Orlic; Enrico Dietz; Sven Frohmann; Christian Mueller; Ruediger Schoen; Martin Trefzer; Hans J. Eichler

doi:10.1117/12.563918

26 October 2004 High-density multilayer recording of microgratings for optical data storage

Susanna Orlic, Enrico Dietz, Sven Frohmann, Christian Mueller, Ruediger Schoen, Martin Trefzer, Hans J. Eichler

Proceedings Volume 5521, Organic Holographic Materials and Applications II; (2004) https://doi.org/10.1117/12.563918
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Susanna Orlic, Enrico Dietz, Sven Frohmann, Christian Mueller, Ruediger Schoen, Martin Trefzer, and Hans J. Eichler "High-density multilayer recording of microgratings for optical data storage", Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); https://doi.org/10.1117/12.563918

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