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- W3106218778 abstract "A class of chalcogenide alloy materials that shows significant changes in optical properties upon an amorphous-to-crystalline phase transition has lead to development of large data capacities in modern optical data storage. Among chalcogenide phase-change materials, Ge2Sb2Te5 (GST) is most widely used because of its reliability. We use a pair of femtosecond light pulses to demonstrate the ultrafast optical manipulation of atomic arrangements from tetrahedral (amorphous) to octahedral (crystalline) Ge-coordination in GST superlattices. Depending on the parameters of the second pump-pulse, ultrafast nonthermal phase-change occurred within only few-cycles (~ 1 ps) of the coherent motion corresponding to a GeTe4 local vibration. Using the ultrafast switch in chalcogenide alloy memory could lead to a major paradigm shift in memory devices beyond the current generation of silicon-based flash-memory." @default.
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- W3106218778 date "2011-01-11" @default.
- W3106218778 modified "2023-10-05" @default.
- W3106218778 title "Ultrafast optical manipulation of atomic arrangements in chalcogenide alloy memory materials" @default.
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- W3106218778 doi "https://doi.org/10.1364/oe.19.001260" @default.
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