Temporal characteristics of few-cycle pulse on- and non-resonance propagating in a ladder-type atomic medium |
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Authors: | Lei Wang |
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Affiliation: | College of Physics and Electronics, Shandong Normal University, Jinan 250014, China |
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Abstract: | Time evolution characteristic of few-cycle pulse propagating in a ladder-type atomic medium is investigated. It is shown that, time evolution of few-cycle pulse has significant difference in the both cases on- and non-resonance. In the non-resonant case, if the pulse central frequency is twice as large as medium atomic transition frequency, the pulse form (including carry-envelope phase, pulse duration, oscillation amplitude and frequency) remains unchanging or remains unchanging basically (only carry-envelope phase has some variation) in the propagation process, which means that self-induced transparency (SIT) or approximate transparency phenomenon appears. However, in the resonant case, the pulse form changes obviously in the propagation process. In addition, there is evident difference in the propagating velocity for on- and non-resonance when the pulse area is smaller. |
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Keywords: | On- and non-resonance Few-cycle pulse propagating Ladder-type medium Self-induced transparency |
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