Effect of relativistic plasma on extreme-ultraviolet harmonic emission from intense laser-matter interactions.
Effect of relativistic plasma on extreme-ultraviolet harmonic emission from intense laser-matter interactions.
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相对论等离子体对强激光-物质相互作用产生的极紫外谐波发射的影响。
DOI：
10.1103/physrevlett.100.125005
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发表时间：
2008
影响因子：
8.6
通讯作者：
M. Zepf
中科院分区：
文献类型：
--
作者：
Karl Krushelnick;W. Rozmus;U. Wagner;F. Beg;S. G. Bochkarev;E. Clark;A. Dangor;R. Evans;A. Gopal;H. Habara;S. Mangles;P. Norreys;A. Robinson;M. Tatarakis;M. Wei;M. Zepf
进行了实验，其中使用强激光脉冲（高达 9x10(19) W/cm(2)）来照射非常薄（亚微米）质量有限的铝箔目标。这种相互作用产生高阶谐波辐射（大于 25 阶），该辐射在目标后部被检测到，并且由于穿过致密的相对论等离子体而显着展宽、调制和去极化。光谱变化被证明是由于激光吸收为热电子以及随后在致密等离子体内急剧增加的相对论电子分量。
Experiments were performed in which intense laser pulses (up to 9x10(19) W/cm(2)) were used to irradiate very thin (submicron) mass-limited aluminum foil targets. Such interactions generated high-order harmonic radiation (greater than the 25th order) which was detected at the rear of the target and which was significantly broadened, modulated, and depolarized because of passage through the dense relativistic plasma. The spectral modifications are shown to be due to the laser absorption into hot electrons and the subsequent sharply increasing relativistic electron component within the dense plasma.