期刊
HIGH ENERGY DENSITY PHYSICS
卷 8, 期 3, 页码 303-306出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hedp.2012.01.002
关键词
Warm Dense Matter; Ballistic electron transport; Fourier Domain lnterferometry
资金
- U.S Department of Energy [DE-AC52-07NA27344]
We have measured the time evolution of the phase shift at the front and back surfaces of gold nano-foils that have been excited with a 150 fs (lambda = 400 nm) laser pulse. The thickness of the foils (d similar to 30 nm) is roughly one-third of the ballistic electron transport range at ambient conditions (similar to 100 nm). At lower pump fluences, the front and back sides of the foil behave similarly, indicating uniform heating by ballistic electrons. As the pump fluence is increased, the phase shift on the front side is higher than that on the back, indicating a significant reduction in the ballistic electron transport range. (C) 2012 Elsevier B.V. All rights reserved.
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