利用原子在圆偏振激光场中的强场电离产生自旋极化电子  

The generation of spin-polarized electrons via strong-field ionization of atoms by circularly polarized laser fields

作　　者：王中元 高轩鸿 景文泉 杜进旭 赵松峰[1] WANG Zhong-Yuan;GAO Xuan-Hong;JING Wen-Quan;DU Jin-Xu;ZHAO Song-Feng(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China)

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《原子与分子物理学报》2025年第3期101-109,共9页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(12164044)。

摘　　要：圆偏振激光场中原子的非绝热强场电离为产生自旋极化电子提供了机会.我们应用这些解析电离速率公式[Ingo Barth and Olga Smirnova,Phys.Rev.A 88,013401(2013)]更系统地研究了通过Kr和Xe原子在右旋圆偏振激光脉冲中的强场电离产生自旋极化电子,并证实了不同自旋态的光电子能量分布有很大差异、电子的自旋极化敏感地依赖于光电子能量.另外,在光电子能谱的低能部分其自旋极化可以达到100%,并且通过调节激光强度和频率可以很好地控制能量积分的自旋极化.Nonadiabatic strong-field ionization of atoms in circularly polarized laser fields offers opportunities for producing the spin-polarized electrons.We applied those analytical ionization rate formulas in[Ingo Barth and Olga Smirnova,Phys.Rev.A 88,013401(2013)]to study more systematically the generation of spin-polarized electrons through strong-field ionization of Kr and Xe atoms in right circularly polarized laser pulses and confirmed that photoelectron energy distributions are quite different for different spin states and the spin polarization of electrons depends sensitively on photoelectron energy.Furthermore,we also show that electrons with up to 100%spin polarization can achieve at the low-energy part of the energy spectra and the energy-integrated spin polarization can be well controlled by adjusting laser intensities and frequencies.

关 键 词：自旋极化电子 非绝热强场电离 右旋圆偏振激光场 

分 类 号：O56[理学—原子与分子物理]