Huang Cheng, Liao Qing, Zhou Yueming, Lu Peixiang
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.
Opt Express. 2010 Jun 21;18(13):14293-300. doi: 10.1364/OE.18.014293.
We have investigated the 2D photoelectron momentum spectra for ATI of atoms exposed to linearly polarized pulses by quantum mechanical calculations. By comparing the 2D momentum spectra for the long-range and short-range Coulomb potentials, the focusing of the electron transverse momentum by the long-range interaction is clearly revealed. Analysis indicates that the Coulomb attraction of the parent core to the returning electron is responsible for the focusing of the electron transverse momentum. Moreover, the strong dependence of the focusing of the electron transverse momentum on the laser wavelength and intensity is discussed.
我们通过量子力学计算研究了原子在受到线偏振脉冲作用时的二维光电子动量谱用于高次谐波产生（ATI）的情况。通过比较长程和短程库仑势的二维动量谱，清晰地揭示了长程相互作用对电子横向动量的聚焦作用。分析表明，母核与返回电子之间的库仑吸引力是电子横向动量聚焦的原因。此外，还讨论了电子横向动量聚焦对激光波长和强度的强烈依赖性。
