Relativistic Doppler effect: Universal spectra and zeptosecond pulses

被引：218

作者：

Gordienko, S ^{[1
]}

Pukhov, A

Shorokhov, O

Baeva, T

机构：

[1] Univ Dusseldorf, Inst Theoret Phys 1, D-40225 Dusseldorf, Germany

[2] LD Landau Theoret Phys Inst, Moscow, Russia

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.93.115002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on a numerical observation of the train of zeptosecond pulses produced by the reflection of a relativistically intense femtosecond laser pulse from the oscillating boundary of an overdense plasma because of the Doppler effect. These pulses promise to become unique experimental and technological tools since their length is of the order of the Bohr radius and the intensity is extremely high proportional to10(19) W/cm(2). We present the physical mechanism, analytical theory, and direct particle-in-cell simulations. We show that the harmonic spectrum is universal: the intensity of nth harmonic scales as 1/n(p) for n<4gamma(2), where gamma is the largest gamma factor of the electron fluid boundary, and p=3 and p=5/2 for the broadband and quasimonochromatic laser pulses, respectively.

引用

页码：115002 / 1

页数：4

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