带内高次谐波产生的周期内与周期间分析
Intra- and intercycle analysis of intraband high-order harmonic generation
AI总结：
本文将带内高次谐波产生信号分解为周期内与周期间项，通过周期内干涉分析确定截止位置、揭示谐波选择规则，并阐明能带结构不同分量对平台区谐波强度标度的贡献。
摘要：
我们研究了由线偏振激光场驱动的带隙材料中产生的带内高次谐波。我们将带内高次谐波产生信号分解为周期内项和周期间项。周期内项唯一地决定了光谱特性，而周期间项仅在长脉冲极限下通过施加能量守恒来调制光谱特征。通过对周期内干涉的分析，确定了截止位置，并揭示了谐波选择规则的起源。此外，还概述了能带结构的不同分量如何对谐波光谱的不同区域做出贡献，从而在平台区产生单个谐波的非平凡强度标度。
英文摘要：
We study intraband high-order harmonic generation arising from a band-gap material driven by a linearly polarized laser field. We factorize the intraband high-order harmonic-generation signal into intracycle and intercycle terms. The intracycle term uniquely determines the spectral characteristics whereas the intercycle term merely modulates the spectral features by imposing energy conservation in the long-pulse limit. Through analysis of the intracycle interference, the cutoff is identified, and the origin of the harmonic selection rules is revealed. Further, it is outlined how different components of the bandstructure contribute to different regions of the harmonic spectrum, giving rise to non-trivial intensity scaling of individual harmonics in the plateau region.
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。
