Frequency multiplication of light back-reflected from a relativistic wake wave
Frequency multiplication of light back-reflected from a relativistic wake wave
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DOI：
10.1063/1.2816443
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发表时间：
2007-12
影响因子：
2.2
通讯作者：
A. Pirozhkov;Jinglong Ma;M. Kando;T. Esirkepov;Y. Fukuda;L. Chen;I. Daito;K. Ogura;T. Homma;Y. Hayashi;H. Kotaki;A. Sagisaka;M. Mori;J. Koga;T. Kawachi;H. Daido;S. V. Bulanov;T. Kimura;Y. Kato;T. Tajima
中科院分区：
文献类型：
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作者：
A. Pirozhkov;Jinglong Ma;M. Kando;T. Esirkepov;Y. Fukuda;L. Chen;I. Daito;K. Ogura;T. Homma;Y. Hayashi;H. Kotaki;A. Sagisaka;M. Mori;J. Koga;T. Kawachi;H. Daido;S. V. Bulanov;T. Kimura;Y. Kato;T. Tajima
由Bulanov、Esirkepov和Tajima提出的相干高频电磁辐射产生的方法[Phys.Rev.Lett. 91，085001（2003）]中所描述的方法。这种方法是基于反射镜反射时的辐射倍频以相对论速度飞行。相对论镜是由超短激光脉冲在尾流中的欠密等离子体中激发的强非线性尾流波中的电子密度调制形成的。在实验中，我们观察到了尾波对反向交叉激光脉冲的反射。检测到的倍频因子在55至114的范围内，对应于7至15 nm的反射辐射波长。这可能会开辟一条通往可调谐的高强度超短相干电磁脉冲源在极紫外和x射线光谱区域。反射尾波的参数可以使用反射辐射作为探针来确定。
A method of coherent high-frequency electromagnetic radiation generation, proposed by Bulanov, Esirkepov, and Tajima [Phys. Rev. Lett. 91, 085001 (2003)], is experimentally demonstrated. This method is based on the radiation frequency multiplication during reflection at a mirror flying with relativistic velocity. The relativistic mirror is formed by the electron density modulations in a strongly nonlinear wake wave, excited in an underdense plasma in the wake behind an ultrashort laser pulse. In our experiments, the reflection of a countercrossing laser pulse from the wake wave is observed. The detected frequency multiplication factor is in the range from 55 to 114, corresponding to a reflected radiation wavelength from 7 to 15nm. This may open a way towards tunable high-intensity sources of ultrashort coherent electromagnetic pulses in the extreme ultraviolet and x-ray spectral regions. Parameters of the reflecting wake wave can be determined using the reflected radiation as a probe.