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Chin. Phys. B, 2012, Vol. 21(5): 054212    DOI: 10.1088/1674-1056/21/5/054212
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Effects of aligning pulse duration on the degree and the slope of nitrogen field-free alignment

Wang Fei(王翡), Jiang Hong-Bing(蒋红兵), and Gong Qi-Huang(龚旗煌)
Department of Physics & State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China
Abstract  Through theoretical analysis, we show how aligning pulse durations affect the degree and the time-rate slope of nitrogen field-free alignment at a fixed pulse intensity. It is found that both the degree and the slope first increase, then saturate, and finally decrease with the increasing pump duration. The optimal durations for the maximum degree and the maximum slope of the alignment are found to be different. Additionally, they are found to mainly depend on the molecular rotational period, and are affected by the temperature and the aligning pump intensities. The mechanism of molecular alignment is also discussed.
Keywords:  field-free molecular alignment      femtosecond phenomenon      strong filed physics  
Received:  13 December 2011      Revised:  27 April 2012      Accepted manuscript online: 
PACS:  42.65.-k (Nonlinear optics)  
Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 10634020, 11074014 and 10821062)

Cite this article: 

Wang Fei(王翡), Jiang Hong-Bing(蒋红兵), and Gong Qi-Huang(龚旗煌) Effects of aligning pulse duration on the degree and the slope of nitrogen field-free alignment 2012 Chin. Phys. B 21 054212

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[1] Low temperature enhancement of alignment-induced spectral broadening of femtosecond laser pulses
Wang Fei (王翡), Jiang Hong-Bing (蒋红兵), Gong Qi-Huang (龚旗煌). Chin. Phys. B, 2014, 23(1): 014201.
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