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Rabi‐oscillations‐induced multiharmonic emission in a Maxwell–Schrödinger study of a dense sample of molecules
Author(s) -
Gupta Ashish K.,
Neuhauser Daniel
Publication year - 2001
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 - 10.1002/1097-461x(2001)81:4<260::aid-qua3>3.0.co;2-m
Subject(s) - sharpening , physics , harmonics , maxwell's equations , atomic physics , rabi frequency , electric field , molecule , pulse (music) , extreme ultraviolet , schrödinger equation , polarizability , quantum electrodynamics , quantum mechanics , laser , voltage , computer science , computer vision
A solution of the combined Maxwell–Schrödinger equations for the propagation of an ultraviolet (UV) pulse in a sample of model H 2 + ‐like molecules (with only two electronic states), shows a significant increase of the emission at 5–10 harmonics for a thick‐density (line integrated density of 50 a.u. −2 ) vs. a thin‐density case. The increase is more than two orders of magnitude larger than the expected factor (the ratio of the squared densities) and is due to a “sharpening” effect whereby Rabi oscillations induce a spatially rapidly varying electric field that has very sharp peaks. Equally important, the molecular degree of freedom is shown to exert a strong influence on the emitted radiation so that multiharmonic emission can be controlled by preparing molecules in specific initial wavepackets. © 2001 John Wiley & Sons, Inc. Int J Quant Chem 81: 260–267, 2001