Shortcut to study angular momentum transfer of harmonic generation in intense laser fields

被引：3
作者：
Su, Yingtong [1 ]
Fang, Kaimin [1 ]
Zhnag, Jingtao [1 ]
机构：
[1] Shanghai Normal Univ, Dept Phys, Shanghai 200234, Peoples R China
来源：
OPTICS EXPRESS | 2021年 / 29卷 / 14期
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
POLARIZATION; IONIZATION;
D O I：
10.1364/OE.430041
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-order harmonics generated from atoms driven by counter-rotating two-color circularly (CRTC) polarized laser fields are studied in the frame of a quantum-field scattering theory. We use a pair of generalized phased Bessel (GPB) functions to describe the harmonic generation amplitude. The use of GPB functions allows us to define the phase of a harmonic channel accurately, by which we obtain the spin angular momentum conservation relation in a straightforward way. The known selection rule of harmonic order in the CRTC field is obtained concisely. Main features of the harmonic spectra are recovered. Our treatment provides a shortcut to study the angular momentum transfer in intense laser fields. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：22679 / 22687
页数：9
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