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Title: 1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage
Authors: Craig, Chris
Zheludev, Nikolay I.
MacDonald, K. F.
Wang, Q.
Maddock, J.
Rogers, E. T. F.
Roy, T.
Hewak, D. W.
Keywords: DRNTU::Science::Physics
Issue Date: 2014
Source: Wang, Q., Maddock, J., Rogers, E. T. F., Roy, T., Craig, C., Macdonald, K. F., et al. (2014). 1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage. Applied Physics Letters, 104(12), 121105-.
Series/Report no.: Applied physics letters
Abstract: We demonstrate high-density, multi-level crystallization of a Ge2Sb2Te5 thin film using tightly focused femtosecond laser pulses. The submicron spots with 8 distinct data storage states are written on a 1.08 μm square grid. The significant change in reflectivity of every specific state of crystallized spot allows easy optical reading and identification. As a demonstration, two gray-scale images are written into the storage medium. Our results open up potential applications in ultra-fast two-dimensional parallel cognitive computing and holography.
ISSN: 0003-6951
DOI: 10.1063/1.4869575
Schools: School of Physical and Mathematical Sciences 
Rights: © 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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