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Three‐peak Autler‐Townes splitting in the photoelectron spectrum of Li 2 molecules caused by femtosecond laser pulses
Author(s) -
Hu WenHui,
Yuan KaiJun,
Han YongChang,
Shu ChuanCun,
Cong ShuLin
Publication year - 2010
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.22165
Subject(s) - rabi cycle , femtosecond , atomic physics , laser , oscillation (cell signaling) , ionization , physics , wave packet , pulse (music) , rabi frequency , population , molecular physics , quantum , chemistry , ion , optics , quantum mechanics , biochemistry , demography , detector , sociology
Three‐peak Autler‐Townes (A‐T) splitting in the resonant multiphoton ionization photoelectron spectrum for a rotating Li 2 molecular system in femtosecond pulse laser fields is studied by using two‐dimension time‐dependent quantum wave packet method. The A‐T splitting results from rapid Rabi oscillation caused by intense femtosecond laser pulses. Because of the effects of molecular rotation and alignment, the Rabi oscillation in the population distribution will be damped in a certain degree. The three‐peak A‐T splitting can only be observed for a strongly aligned molecule with rapid Rabi oscillation. The three‐peak A‐T splitting dynamics can be affected by intensity, duration, temporal profile of laser pulse, and initial molecular rotational temperature. The conditions to observe the A‐T splitting are discussed in detail. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2010