Zeptosecond birth time delay in molecular photoionization

doi:10.1126/science.abb9318

GSTDTAP > 气候变化

DOI	10.1126/science.abb9318
	Zeptosecond birth time delay in molecular photoionization
	Sven Grundmann; Daniel Trabert; Kilian Fehre; Nico Strenger; Andreas Pier; Leon Kaiser; Max Kircher; Miriam Weller; Sebastian Eckart; Lothar Ph. H. Schmidt; Florian Trinter; Till Jahnke; Markus S. Schöffler; Reinhard Dörner
	2020-10-16
发表期刊	Science
出版年	2020
英文摘要	There is currently considerable interest in experimental studies of various ultrafast processes. Of particular interest are the real-time dynamics of photoionization, one of the most fundamental processes caused by the light-matter interaction, in which the absorption of a photon leads to the ejection of an electron and the formation of anion. Using an electron interferometric technique, Grundmann et al. report a birth time delay on the order of a few hundred zeptoseconds between two electron emissions from the two sides of molecular hydrogen, which is interpreted as the travel time of the photon across the molecule. The proposed technique is generally applicable to more complex systems, and further studies are necessary to support this interpretation. Science , this issue p. [339][1] Photoionization is one of the fundamental light-matter interaction processes in which the absorption of a photon launches the escape of an electron. The time scale of this process poses many open questions. Experiments have found time delays in the attosecond (10−18 seconds) domain between electron ejection from different orbitals, from different electronic bands, or in different directions. Here, we demonstrate that, across a molecular orbital, the electron is not launched at the same time. Rather, the birth time depends on the travel time of the photon across the molecule, which is 247 zeptoseconds (1 zeptosecond = 10−21 seconds) for the average bond length of molecular hydrogen. Using an electron interferometric technique, we resolve this birth time delay between electron emission from the two centers of the hydrogen molecule. [1]: /lookup/doi/10.1126/science.abb9318
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/299344
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Sven Grundmann,Daniel Trabert,Kilian Fehre,et al. Zeptosecond birth time delay in molecular photoionization[J]. Science,2020.
APA	Sven Grundmann.,Daniel Trabert.,Kilian Fehre.,Nico Strenger.,Andreas Pier.,...&Reinhard Dörner.(2020).Zeptosecond birth time delay in molecular photoionization.Science.
MLA	Sven Grundmann,et al."Zeptosecond birth time delay in molecular photoionization".Science (2020).