超短脉冲laser与金属纳米层或等离子体层相互作用中的线性和非线性绝对相位效应
Linear and nonlinear absolute phase effects in interactions of ultrashort laser pulses with a metal nano-layer or with a plasma layer
摘要：
结果表明，在超短激光脉冲入射到金属纳米层上产生的散射辐射中，出现了具有确定符号的非振荡尾波场。这些尾场的大小与入射场强成比例，它们的符号由入射脉冲的载波包络相位差的余弦决定。在相对论激光强度下，靶被认为是真空中的等离子体层，由薄箔通过预脉冲产生，随后是主高强度激光脉冲。来自表面电流密度（代表等离子体电子）的相对论运动学的非线性导致在散射光谱中出现高次谐波。通常，由于存在强度相关因子，谐波峰被下屏蔽。这些频谱的某些区域对载波包络相位差的变化非常敏感。光谱有一个长尾巴，其中峰的高度几乎在一个数量级内变化，形成准连续。通过傅里叶综合，从这个平台区的成分已经获得阿秒脉冲。
英文摘要：
It has been shown that in the scattered radiation, generated by an ultrashort laser pulse impinging on a metal nano-layer, non-oscillatory wake-fields appear with a definite sign. The magnitude of these wake-fields is proportional with the incoming field strength, and a sign of them is governed by the cosine of the carrier-envelope phase difference of the incoming pulse. At relativistic laser intensities the target is considered as a plasma layer in vacuum, produced from a thin foil by a pre-pulse, which is followed by the main high-intensity laser pulse. The nonlinearities stemming from the relativistic kinematics of the surface current density (representing the plasma electrons) lead to the appearance of higher-harmonics in the scattered spectra. In general, the harmonic peaks are down-shited due to the presence of an intensity-dependent factor. Certain regions of these spectra are very sensitive to the variation of the carrier-envelope phase difference. The spectra has a long tail where the heigths of the peaks vary practically within one order of magnitude forming a quasi-continuum. By Fourier synthetising the components from this plateau region attosecond pulses have been obtained.
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。
