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- W2113985723 abstract "Femtosecond laser-irradiation-induced phase change of amorphous N-doped Ge8Sb92 films is in situ studied by coherent phonon spectroscopy. We have observed that a new coherent optical phonon (COP) mode occurs as laser irradiation fluence reaches certain thresholds, indicating laser-induced phase changes. Additionally, this new phonon mode has also been verified in heat-annealing-crystallized N-doped Ge8Sb92 films, confirming the emergence of laser-irradiation-induced crystallization. By measuring the pump fluence dependence of COP dynamics in laser-crystallized N-doped Ge8Sb92 films, we found that the frequency and lifetime of COP decrease with the increasing of pump fluence, which suggests good crystallinity in laser-crystallized N-doped Ge8Sb92 films. It has also been observed that the crystallization temperature of amorphous N-doped Ge8Sb92 films increases with N-doping content. Our results indicate promising applications of N-doped Ge8Sb92 films in optical phase-change memory devices." @default.
- W2113985723 created "2016-06-24" @default.
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- W2113985723 date "2015-04-01" @default.
- W2113985723 modified "2023-10-18" @default.
- W2113985723 title "Femtosecond laser-induced crystallization of amorphous N-doped Ge8Sb92 films and <i>in situ</i> characterization by coherent phonon spectroscopy" @default.
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- W2113985723 doi "https://doi.org/10.1063/1.4916726" @default.
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