Journal
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
Volume 100, Issue 6, Pages 834-844Publisher
WILEY
DOI: 10.1002/qua.20252
Keywords
attosecond science; electron localization
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Numerical solutions of the time-dependent Schrodinger equation for a ID model non-Born-Oppenheimer H-2(+) are used to illustrate the nonlinear nonperturbative response of molecules to intense (I greater than or equal to 10(13) W/cm(2)), ultrashort (t < 10 fs) laser pulses. Molecular high-order harmonic generation (MEOHG) is shown to be an example of such response and the resulting nonlinear photon emission spectrum is shown to lead to the synthesis of single attosecond (10(-18) s) pulses. Application of such ultrashort pulses to the H-2(+) system results in localized electron wavepackets whose motion can be detected by asymmetry in the photoelectron spectrum generated by a subsequent probe attosecond pulse, thus leading to measurement of electron motion in molecules on the attosecond time scale. (C) 2004 Wiley Periodicals, Inc.
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