Laser-pulse-induced second-harmonic and hard X-ray emission: Role of plasma-wave breaking

被引：47
作者：
Sandhu, AS [1 ]
Kumar, GR
Sengupta, S
Das, A
Kaw, PK
机构：
[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[2] Inst Plasma Res, Gandhinagar 382428, India
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 02期
关键词：
D O I：
10.1103/PhysRevLett.95.025005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (10(16) W cm(-2), 100 fs) with a preplasma generated on a solid target. We observe that for a particular length scale the second harmonic goes through a minimum, while hard x-ray emission on the contrary maximizes. Theoretical or numerical modeling of this anticorrelation in terms of wave breaking of strongly driven electron plasma waves clearly brings out hitherto unexplored links between the physical mechanisms of second-harmonic generation and hard x-ray emission.
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页数：4
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