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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2013-05-01

发表刊物：JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY

收录刊物：SCIE

卷号：12

期号：3

ISSN号：0219-6336

关键字：Molecular orientation; THz pulse; dissipative dynamics

摘要：We present a theoretical scheme for achieving the field-free molecular orientation in dissipative media by a combination of femtosecond and THz laser pulses. Numerical calculations are performed by solving the quantum Liouville equation based on multilevel Bloch model. The molecular orientation degree is sensitive to the carrier-envelope phase of the THz pulse and the delay time between the two pulses. The orientation and the rotational population of CO molecules in dissipative environment are computed at different pressures and temperatures. The influence of pure decoherence on the molecular orientation is also discussed.