Delay in Photoemission

作者：Schultze M^*; Fiess M; Karpowicz N; Gagnon J; Korbman M; Hofstetter M; Neppl S; Cavalieri A L; Komninos Y; Mercouris Th; Nicolaides C A; Pazourek R; Nagele S; Feist J; Burgdoerfer J; Azzeer A M; Ernstorfer R; Kienberger R; Kleineberg U; Goulielmakis E; Krausz F; Yakovlev V S

来源：Science, 2010, 328(5986): 1658-1662.

DOI：10.1126/science.1189401

Photoemission from atoms is assumed to occur instantly in response to incident radiation and provides the basis for setting the zero of time in clocking atomic-scale electron motion. We used attosecond metrology to reveal a delay of 21 +/- 5 attoseconds in the emission of electrons liberated from the 2p orbitals of neon atoms with respect to those released from the 2s orbital by the same 100-electron volt light pulse. Small differences in the timing of photoemission from different quantum states provide a probe for modeling many-electron dynamics. Theoretical models refined with the help of attosecond timing metrology may provide insight into electron correlations and allow the setting of the zero of time in atomic-scale chronoscopy with a precision of a few attoseconds.

• 出版日期2010-6-25