We propose a method to retrieve the angle-dependent strong-field ionization of highest occupied molecular orbital(HOMO)from high-order harmonic generation(HHG)of aligned molecules.This method is based on the single-mo...We propose a method to retrieve the angle-dependent strong-field ionization of highest occupied molecular orbital(HOMO)from high-order harmonic generation(HHG)of aligned molecules.This method is based on the single-molecule quantitative rescattering model with known alignment distribution and photo-recombination cross sections of fixed-in-space molecules.With the macroscopic HHG of aligned N2 molecules,we show that angledependent ionization of HOMO can be successfully retrieved at both low and high degrees of alignment.We then show that the error in the retrieved angular dependence of ionization becomes larger if the uncertainty in the alignment distribution is introduced in the retrieval procedure.We also examine that the retrieved ionization of HOMO is much deviated from the accurate one if the intensity of probe laser becomes higher such that inner HOMO-1 can contribute to HHG.展开更多
基金Supported by the National Natural Science Foundation of China(Grant Nos.11774175,91950102,11834004,and 91850209)the National Key Research and Development Program of China(Grant No.2018YFB0504400)+2 种基金the Science and Technology Commission of Shanghai Municipality(Grant No.18DZ1112700)the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB16030300)the Key Research Program of Frontier Sciences of Chinese Academy of Sciences(Grant No.QYZDJ-SSWSLH010)。
文摘We propose a method to retrieve the angle-dependent strong-field ionization of highest occupied molecular orbital(HOMO)from high-order harmonic generation(HHG)of aligned molecules.This method is based on the single-molecule quantitative rescattering model with known alignment distribution and photo-recombination cross sections of fixed-in-space molecules.With the macroscopic HHG of aligned N2 molecules,we show that angledependent ionization of HOMO can be successfully retrieved at both low and high degrees of alignment.We then show that the error in the retrieved angular dependence of ionization becomes larger if the uncertainty in the alignment distribution is introduced in the retrieval procedure.We also examine that the retrieved ionization of HOMO is much deviated from the accurate one if the intensity of probe laser becomes higher such that inner HOMO-1 can contribute to HHG.
