22 May 2006 Attosecond molecular photoelectron spectroscopy
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Abstract
A theoretical study is presented suggesting possible photoelectron spectroscopy measurement of electron dynamics on molecules on "attosecond" time scales. In particular, we study analytically the photoionization of a coherent superposition of molecular electron states by an ultrashort, attosecond X-ray pulse. We show that the broad photoelectron spectrum inherent in attosecond pulse ionization contains detailed information about the time-dependent electron wave packet. Such ultrashort pulse photoionization leads to an asymmetry of the photoelectron momentum distribution and this seems to measure the momentum asymmetry of the initial coherently prepared electron bound state. We show further that universal molecular Coulomb interference effect occur in ultrashort pulse photoionization and other processes with fast momentum transfers. Thus "attosecond" photoelectron spectra and their inherent asymmetry allow to monitor and in principle to control electron motion on the attosecond time scale.
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André D. Bandrauk, André D. Bandrauk, Szczepan Chelkowski, Szczepan Chelkowski, Gennady L. Yudin, Gennady L. Yudin, } "Attosecond molecular photoelectron spectroscopy", Proc. SPIE 6256, ICONO 2005: Ultrafast Phenomena and Physics of Superintense Laser Fields; Quantum and Atom Optics; Engineering of Quantum Information, 62560M (22 May 2006); doi: 10.1117/12.682374; https://doi.org/10.1117/12.682374
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