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arXiv 1909.00728physics.atom-ph
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利用扭曲电子产生高次谐波

High Harmonic Generation with Twisted Electrons

Sebastian Gemsheim, Jan-Michael Rost

摘要:

本文用解析和数值方法研究了线偏振光作用下扭曲电子产生的高次谐波辐射谱。从具有轨道角动量的电子连续态到束缚态的跃迁产生圆偏振阿秒脉冲。对于扭曲波包的中心碰撞,连续束缚跃迁服从偶极选择规则。对于非中心碰撞,由于扭曲波包的横向拓扑结构,随着碰撞参量的增加,发生从圆偏振到线偏振的交叉。

英文摘要:

We present analytically and numerically the spectrum of high harmonic emission generated by twisted electrons in the presence of linearly polarized light. Ensuing transitions from electronic continuum states with orbital angular momentum to bound states give rise to circularly polarized attosecond pulses. For central collisions with twisted wavepackets continuum-bound transitions are subject to dipole selection rules. For non-central collisions a crossover from circularly to linearly polarized emission occurs for increasing impact parameter, due to the transverse topology of twisted wavepackets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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