Lai XuanYang, Wang ChuanLiang, Chen YongJu, Hu ZiLong, Quan Wei, Liu XiaoJun, Chen Jing, Cheng Ya, Xu ZhiZhan, Becker Wilhelm
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China and Graduate School of Chinese Academy of Sciences, Beijing 100080, China.
Phys Rev Lett. 2013 Jan 25;110(4):043002. doi: 10.1103/PhysRevLett.110.043002. Epub 2013 Jan 23.
We demonstrate the significant role of long quantum orbits in strong-field atomic processes by investigating experimentally and theoretically the above-threshold ionization spectra of noble gases in intense elliptically polarized laser pulses. With increasing laser ellipticity, the yields of different energy regions of the measured electron spectrum in high-order above-threshold ionization drop at different rates. The experimental features can be reproduced by a theoretical simulation based on quantum-orbit theory, revealing that increasing ellipticity favors the contributions of the long quantum orbits in the high-order above-threshold ionization process.
通过对照实验和理论研究强椭圆偏振激光脉冲中稀有气体的阈上电离光谱，我们证明了长量子轨道在强场原子过程中的重要作用。随着激光椭圆率增加，高阶阈上电离中测得的电子能谱不同能量区域的产率以不同速率下降。基于量子轨道理论的理论模拟能够重现实验特征，这表明椭圆率增加有利于长量子轨道在高阶阈上电离过程中的贡献。
