,Probing the structure of multi-center molecules with odd-even high harmonics

• 作 者: Ning Su Shujuan Yu Weiyan Li Shiping Yang Yanjun Chen
• 机 构: College of Physics and Information Technology, Shaan’xi Normal University, Xi’an 710119, China“,”Col
• 出 处: 中国物理B（英文版）
• 发表日期: 2018年5期
• 关键词: odd-even harmonics multi-center asymmetric molecules molecular structure

We study high-order harmonic generation (HHG) from multi-center asymmetric linear molecules numerically and analytically.Our simulations show that odd and even HHG spectra of the asymmetric multi-center system respond differently to the change of the molecular structure.Specifically,when the inteuclear distances between these nuclei of the molecule have a small change,the odd spectra usually do not change basically,but the even spectra differ remarkably.Based on this phenomenon,a simple procedure is proposed to probe the positions of these nuclei with odd-even HHG.Our results shed light on attosecond probing of the structure of multi-center molecules using HHG.