Conical Intersection versus Avoided Crossing:Geometric Phase Effect in Molecular High-Order Harmonics

作     者：Guanglu Yuan Ruifeng Lu Shicheng Jiang Konstantin Dorfman 

作者机构：Institute of Ultrafast Optical PhysicsMIIT Key Laboratory of Semiconductor Microstructure and Quantum SensingDepartment of Applied PhysicsNanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Precision SpectroscopyEast China Normal UniversityShanghai 200062China Center for Theoretical Physics and School of ScienceHainan UniversityHaikou 570228.China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuanShanxi 030006China Himalayan Institute for Advanced StudyUnit of Gopinath Seva FoundationMIG 38Avas VikasRishikeshUttarakhand 249201India 

出 版 物：《Ultrafast Science》 (超快科学（英文）)

年 卷 期：2023年第3卷第5期

页      面：61-66页

学科分类：07[理学] 0701[理学-数学] 0702[理学-物理学] 070101[理学-基础数学] 

基　　金：supported by the National Key Research and Development Program of China (Grant No.2022YFA1604301) the National Natural Science Foundation of China (Grant Nos.12074124 and 11974185) Zijiang Endowed Young Scholar Fund,East China Normal University,and Overseas Expertise Introduction Project for Discipline Innovation (B12024) support by the start-up funding from East China Normal University 

主　　题：intersection conical spectrum 

摘      要：Nonadiabatic dynamics around an avoided crossing or a conical intersection play a crucial role in the photoinduced processes of most polyatomic *** present work shows that the topological phase in conical intersection makes the behavior of pump-probe high-order harmonic signals different from the case of avoided *** coherence built up when the system crosses the avoided crossing will lead to the oscillatory behavior of the spectrum,while the geometric phase erodes these oscillations in the case of conical ***,the dynamical blueshift and the splitting of the time-resolved spectrum allow capturing the snapshot dynamics with the sub-femtosecond resolution.