Tracing orbital photographs on ultrafast time scales

Electron dynamics in time and house

Following molecular excitation and electron switch processes in time and house inside a single experiment is a long-standing objective of spectroscopy within the discipline of chemistry. Wallauer et al. mixed tomographic photoemission imaging with a femtosecond pump-probe scheme to hint the excited state molecular orbitals of surface-adsorbed molecules with each spatial and temporal decision. The current demonstration opens a brand new window for investigating the ultrafast electron switch dynamics in such processes as chemical reactions on surfaces and intermolecular cost transfers.

Science, this difficulty p. 1056


Frontier orbitals decide elementary molecular properties similar to chemical reactivities. Though electron distributions of occupied orbitals may be imaged in momentum house by photoemission tomography, it has to date been not possible to observe the momentum-space dynamics of a molecular orbital in time, for instance, via an excitation or a chemical response. Right here, we mixed time-resolved photoemission utilizing excessive laser harmonics and a momentum microscope to ascertain a tomographic, femtosecond pump-probe experiment of unoccupied molecular orbitals. We measured the complete momentum-space distribution of transiently excited electrons, connecting their excited-state dynamics to real-space excitation pathways. As a result of in molecules this distribution is carefully linked to orbital shapes, our experiment could, sooner or later, supply the potential for observing ultrafast electron movement in time and house.

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