期刊
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
卷 50, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6455/aa7098
关键词
coupling of multiple orbitals; multiple ionisation and fragmentation of polyatomic molecules; enhanced ionisation
资金
- Austrian Science Fund (FWF) [P28475-N27, P21463-N22, P25615-N27, P27491-N27, SFB-F49 NEXTlite]
- ERC (project CyFi)
- National Science Foundation (NSF) [Phy 1314463, IIA126117]
- Japan Society for the Promotion of Science (JSPS KAKENHI) [15K17805, 24245003, 15H05696]
- Austrian Science Fund (FWF) [P 28475] Funding Source: researchfish
- Austrian Science Fund (FWF) [P28475] Funding Source: Austrian Science Fund (FWF)
- Grants-in-Aid for Scientific Research [15H05696, 15K17805] Funding Source: KAKEN
We present the results of a combined experimental and numerical study on strong-field ionisation of acetylene performed with the aim of identifying the mechanism behind the previously reported surprisingly large multi-electron ionisation probabilities of polyatomic molecules. Using coincidence momentum imaging techniques and time-dependent density functional simulations, we show that the reported efficient ionisation is due to the combined action of a significant geometrically induced energy upshift of the most relevant valence orbitals as the C-H distance stretches beyond about two times the equilibrium distance, and a strong increase in the coupling between multiple molecular orbitals concomitant with this stretch motion. The identified enhanced ionisation mechanism, which we refer to as EIC-MOUSE, is only effective for molecules aligned close to parallel to the laser polarisation direction, and is inhibited for perpendicularly aligned molecules because of a suppression of the C-H stretch motion during the onset of ionisation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据