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Attosecond localization of electrons in molecules
Author(s) -
Bandrauk André D.,
Chelkowski Stephane,
Nguyen Hong Shon
Publication year - 2004
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.20252
Subject(s) - attosecond , physics , electron , high harmonic generation , atomic physics , ultrashort pulse , asymmetry , laser , pulse (music) , photon , nonlinear system , quantum mechanics , voltage
Numerical solutions of the time‐dependent Schrödinger equation for a 1D model non‐Born–Oppenheimer H + 2are used to illustrate the nonlinear nonperturbative response of molecules to intense ( I ≥ 10 13 W/cm 2 ), ultrashort ( t < 10 fs) laser pulses. Molecular high‐order harmonic generation (MHOHG) 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 + 2system 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. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004