利用飞秒高次谐波瞬态吸收光谱对强场电离氙原子进行量子态分辨探测。
Quantum state-resolved probing of strong-field-ionized xenon atoms using femtosecond high-order harmonic transient absorption spectroscopy.
作者信息
Loh Zhi-Heng, Khalil Munira, Correa Raoul E, Santra Robin, Buth Christian, Leone Stephen R
机构信息
Department of Chemistry and Physics, University of California, Berkeley, California 94720, USA.
出版信息
Phys Rev Lett. 2007 Apr 6;98(14):143601. doi: 10.1103/PhysRevLett.98.143601. Epub 2007 Apr 5.
Femtosecond high-order harmonic transient absorption spectroscopy is used to resolve the complete |j,m quantum state distribution of Xe+ produced by optical strong-field ionization of Xe atoms at 800 nm. Probing at the Xe N4/5 edge yields a population distribution rhoj,|m| of rho3/2,1/2ratiorho1/2,1/2ratiorho3/2,3/2=75+/-6 :12+/-3 :13+/-6%. The result is compared to a tunnel ionization calculation with the inclusion of spin-orbit coupling, revealing nonadiabatic ionization behavior. The sub-50-fs time resolution paves the way for tabletop extreme ultraviolet absorption probing of ultrafast dynamics.
飞秒高次谐波瞬态吸收光谱用于解析在800nm处对Xe原子进行光强场电离所产生的Xe⁺的完整|j,m|量子态分布。在Xe N4/5边缘进行探测得到的布居分布ρj,|m|为ρ3/2,1/2:ρ1/2,1/2:ρ3/2,3/2 = 75±6 : 12±3 : 13±6%。将该结果与包含自旋 - 轨道耦合的隧道电离计算结果进行比较，揭示了非绝热电离行为。低于50飞秒的时间分辨率为超快动力学的桌面极紫外吸收探测铺平了道路。
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