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Proceedings Paper

Three-dimensional optical storage by use of an ultrafast laser
Author(s): Sumei M. Huang; Ming Hui Hong; Ding Jiang Wu; L. H. Van; T. S. Ong; Boris S. Luk'yanchuk; Tow Chong Chong
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Paper Abstract

The feasibility of multilayered optical data storage is examined in glass, quartz, polycarbonate and a rhodamine B and Au (III) doped PMMA medium by using a focused 800 nm, 100-fs pulsed laser. Refractive-index or fluorescent data patterns are recorded by use of an objective to focus laser pulses inside these transparent medium. The laser pulse produces a submicrometer-diameter structurally altered region in the material. For glass, quartz and polycarbonate materials, we record binary information by writing such bits in multiple planes and read it out with a microscope. We demonstrate data storage and retrieval with 0.6-μm in-plane bit spacing and 10-μm interplane spacing (100 Gbits/cm3). Scanning electron microscopy (SEM) are used to characterize structural changes in these materials. For the rhodamine B and Au (III) doped PMMA medium, fluorescent spectra are measured before and after laser treatment. Writing three-dimensional data bit inside the transparent medium based on a multi-photon absorption process is expected to become a useful method used to fabricate optical memory with both an ultra-high storage density and an ultra-high storage density and an ultra-high recording speed.

Paper Details

Date Published: 16 September 2003
PDF: 5 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.533067
Show Author Affiliations
Sumei M. Huang, Data Storage Institute (Singapore)
Ming Hui Hong, Data Storage Institute (Singapore)
Ding Jiang Wu, Data Storage Institute (Singapore)
L. H. Van, Data Storage Institute (Singapore)
T. S. Ong, Data Storage Institute (Singapore)
Boris S. Luk'yanchuk, Data Storage Institute (Singapore)
Tow Chong Chong, Data Storage Institute (Singapore)

Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003
Michael O'Neill; Naoyasu Miyagawa, Editor(s)

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