Quantum interference in laser-induced nonsequential double ionization in diatomic molecules: Role of alignment and orbital symmetry
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2008
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Resumo |
We address the influence of the orbital symmetry and the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules, in the length and velocity gauges. We work within the strong-field approximation and assume that the second electron is dislodged by electron-impact ionization, and also consider the classical limit of this model. We show that the electron-momentum distributions exhibit interference maxima and minima due to electron emission at spatially separated centers. The interference patterns survive integration over the transverse momenta for a small range of alignment angles, and are sharpest for parallel-aligned molecules. Due to the contributions of the transverse-momentum components, these patterns become less defined as the alignment angle increases, until they disappear for perpendicular alignment. This behavior influences the shapes and the peaks of the electron-momentum distributions. U. K. EPSRC [EP/D07309X/1]; Faculty Research Fund of the School of Mathematics and Physical Sciences (UCL) |
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Idioma(s) |
英语 |
Fonte |
Figueira De Morisson Faria C.;Shaaran T.;Liu X.;Yang W. .,Phys. Rev. A,2008,78(4):43407- |
Palavras-Chave | #激光技术;激光物理与基本理论 #Aligned molecules #Alignment angles #Classical limits #Diatomic molecules #Field approximations #Field polarizations #Interference maximum #Interference patterns #Molecular alignments #Momentum distributions #Nonsequential double ionizations #Orbital symmetries #Quantum interferences |
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期刊论文 |