阈上德布罗意波干涉产生的阿秒电子脉冲
Attosecond electron pulses from interference of above-threshold de Broglie waves
摘要：
结果表明，强激光脉冲在金属表面产生的阈上电子德布罗意波的干涉产生了阿秒电子脉冲。由于固有的运动色散，阿秒德布罗意波在真空中的传播与不改变形状的阿秒光脉冲的传播有很大的不同。在金属表面之上，即使在宏观距离处，也存在电子流的“电子带”和“复活层”。在所考虑的参数范围内，这种超短电子脉冲的电流密度的最大值估计为每平方厘米零点几毫安的量级。
英文摘要：
It is shown that the the interference of above-threshold electron de Broglie waves, generated by an intense laser pulse at a metal surface yields attosecond electron pulses. This inerference is an analogon of the superposition of high harmonics generated from rare gas atoms, resulting in trains of attosecond light pulses.Owing to the inherent kinematic dispersion, the propagation of attosecond de Broglie waves in vacuum is very different from that of attosecond light pulses, which propagate without changing shape. Above the metal surface there are "collaps bands" and "revival layers" of the electron current even at macroscopic distances. In the range of parameters considered, the maximum value of the current densities of such ultrashort electron pulses has been estimated to be of order of couple of tenths of milliamps per square centimeters.
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