Førre M, Hansen J P, Kocbach L, Selstø S, Madsen L B
Department of Physics and Technology, University of Bergen, N-5007 Bergen, Norway.
Phys Rev Lett. 2006 Jul 28;97(4):043601. doi: 10.1103/PhysRevLett.97.043601. Epub 2006 Jul 24.
The ionization of H(1s) in superintense, high-frequency, attosecond pulses is studied beyond the dipole approximation. We identify a unique nondipole 3rd lobe in the angular distribution of the ejected electron and show that this lobe has a well-defined classical counterpart. The ionization is likely to occur in the direction opposite to the laser propagation direction, which is fully understood from an analysis of the classical dynamics.
在超越偶极近似的情况下，研究了超强、高频、阿秒脉冲中H(1s)的电离。我们在出射电子的角分布中识别出一个独特的非偶极第三瓣，并表明该瓣具有明确的经典对应物。电离很可能发生在与激光传播方向相反的方向，这从经典动力学分析中可以完全理解。
