Imaging the geometrical structure of complex symmetric molecules by above-threshold ionization spectrum in an ir+xuv laser field

作     者：Zhou, Xu-Cong Shi, Shang Li, Fei Guo, Ying-Chun Yang, Yu-Jun Meng, Qing-Tian Chen, Jing Liu, Xiao-Jun Wang, Bingbing 

作者机构：Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physics and Electronics Shandong Normal University Jinan250358 China Department of Physics School of Physics and Electronics East China Normal University Shanghai200062 China Jilin University Insititute of Atomic and Molecular Physics Changchun130012 China Center for Applied Physics and Technology Peking University Hedps Beijing100871 China Institute of Applied Physics and Computational Mathematics Beijing100088 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan430071 China University of Chinese Academy of Sciences Beijing100049 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2019年

核心收录：

主　　题：Wave functions 

摘      要：Based on the frequency-domain theory, we put forward a method of imaging the complex symmetrical polyatomic molecules by using IR+XUV two-color laser fields. Although the wave function of a polyatomic molecule, such as SF6, is quite complex in momentum space, it can be simplified by several terms in the region of high value of momentum, where the destructive interference fringes from these terms carry the information of the molecular structure. In this work, we find that, since the XUV laser field may increases the kinetic energy of the photoelectron dramatically in the above-threshold ionization (ATI) process of a molecule in an IR+XUV two-color laser field, the information of the molecular structure can be obtained by analyzing the interference fringes of the ATI spectrum in the high-energy region, where the simplified wave function of the molecule plays a dominant role in this part of the ATI spectrum. This method provides a unique accessible route towards imaging polyatomic molecules from a frequency perspective. Copyright © 2019, The Authors. All rights reserved.