When a few-cycle vortex laser interacted with an inversion-symmetric atomic-like system, beyond the usual odd-order harmonics, some additional components also occur. The detailed numerical investigation on their transverse field distributions discloses that they depend sensitively on the carrier-envelope-phase (CEP) and the rotation period of the transverse distribution is 2 π . This could be used to directly determine the CEP value of an incident pulse, unique without falling back on specific polar molecules or static electric fields.

中文翻译：

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几周期涡旋激光诱导的谐波的载波-包络相位相关性

当几个周期的涡旋激光与反对称的类原子系统相互作用时，除了通常的奇数阶谐波以外，还会出现一些其他分量。关于它们的横向场分布的详细数值研究表明，它们敏感地取决于载波-包络相（CEP），并且横向分布的旋转周期为2π。这可用于直接确定入射脉冲的CEP值，而不会回落到特定的极性分子或静电电场上，这是唯一的。