期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.123601
关键词
-
资金
- NSF
- Division of Chemical Sciences, Office of Basic Energy Sciences, Office of Energy Research, U.S. DOE
Recent attosecond-streaking spectroscopy experiments [A. L. Cavalieri , Nature (London) 449, 1029 (2007)] using copropagating extreme ultraviolet (XUV) and infrared (IR) pulses of variable relative delay have measured a delay of approximately 100 attoseconds between photoelectrons emitted by a single XUV photon from localized core states and delocalized conduction-band states of a tungsten surface. We analyze the underlying XUV-photoemission-IR-streaking mechanism by combining a perturbative description of the XUV-photoemission process and the subsequent nonperturbative IR streaking of the photoelectrons. Our calculated time-resolved photoelectron spectra agree with the experiments of Cavalieri et al. and demonstrate that the observed temporal shift is caused by the interference of core-level photoelectrons that originate in different layers of the solid.
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