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

A. S. Sandhu; G. R. Kumar; S. Sengupta; A. Das; P. K. Kaw

doi:10.1103/PhysRevLett.95.025005

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

A. S. Sandhu, G. R. Kumar, S. Sengupta, A. Das, P. K. Kaw

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Abstract

We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (1016Wcm-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.

Original language	English (US)
Article number	025005
Journal	Physical review letters
Volume	95
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.95.025005
State	Published - Jul 8 2005
Externally published	Yes

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General Physics and Astronomy

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10.1103/PhysRevLett.95.025005

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abstract = "We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (1016Wcm-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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AU - Sandhu, A. S.

AU - Kumar, G. R.

AU - Sengupta, S.

AU - Das, A.

AU - Kaw, P. K.

PY - 2005/7/8

Y1 - 2005/7/8

N2 - We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (1016Wcm-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.

AB - We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (1016Wcm-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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Laser-pulse-induced second-harmonic and hard x-ray emission: Role of plasma-wave breaking

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