کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9801890 1515733 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct and real-time probing of both coherent and thermal lattice motions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Direct and real-time probing of both coherent and thermal lattice motions
چکیده انگلیسی
We report direct measurement of laser-induced ultrafast structural dynamics on the atomic time and length scales in a 20-nm Al film by taking real-time snapshots of transmission electron diffraction patterns. The damped single-mode breathing motion of the Al film along the surface normal was recorded as coherent and in-phase oscillations of all the Bragg peak positions, which had a period of 6.4 ps. The concurrent lattice heating with a time constant of 630 fs was measured by tracking the associated Bragg peak intensity attenuation. These results suggest a direct approach to identify the mechanisms of laser-induced ultrafast solid-liquid phase transition, as well as thermal or non-thermal melting, via probing the temporal evolution of their diffraction patterns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 136, Issues 9–10, December 2005, Pages 559-563
نویسندگان
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