1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage
1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage
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.
Wang, Qian
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Maddock, Jonathan
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Rogers, E.T.F.
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Roy, Tapashree
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Craig, C.
2328b42b-552e-4a82-941d-45449e952f10
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Hewak, D.W.
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Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
2014
Wang, Qian
a9a64412-49cc-4ab7-9bb6-646551219d66
Maddock, Jonathan
7a64744f-cd7c-4c6a-b584-af266dd08da5
Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Roy, Tapashree
094726f3-177b-468a-be7a-f299d6c4fef5
Craig, C.
2328b42b-552e-4a82-941d-45449e952f10
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Wang, Qian, Maddock, Jonathan, Rogers, E.T.F., Roy, Tapashree, Craig, C., MacDonald, Kevin F., Hewak, D.W. and Zheludev, Nikolay I.
(2014)
1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage.
Applied Physics Letters, 104, [121105].
(doi:10.1063/1.4869575).
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.
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Published date: 2014
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 363653
URI: http://eprints.soton.ac.uk/id/eprint/363653
ISSN: 0003-6951
PURE UUID: 997a31fc-8af7-4ff4-8082-cbd7688f0647
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Date deposited: 28 Mar 2014 14:45
Last modified: 15 Mar 2024 03:42
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Contributors
Author:
Qian Wang
Author:
Jonathan Maddock
Author:
E.T.F. Rogers
Author:
Tapashree Roy
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