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

doi:10.1088/1674-1056/21/5/054212

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 54212-054212.doi: 10.1088/1674-1056/21/5/054212

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

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

王翡,蒋红兵,龚旗煌

Department of Physics & State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China

收稿日期:2011-12-13 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grants Nos. 10634020, 11074014 and 10821062)

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

Received:2011-12-13 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grants Nos. 10634020, 11074014 and 10821062)

摘要/Abstract

摘要： 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.

关键词: field-free molecular alignment, femtosecond phenomenon, strong filed physics

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.

Key words: field-free molecular alignment, femtosecond phenomenon, strong filed physics

中图分类号: (Nonlinear optics)

42.65.-k

王翡,蒋红兵,龚旗煌. Effects of aligning pulse duration on the degree and the slope of nitrogen field-free alignment[J]. 中国物理B, 2012, 21(5): 54212-054212.

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[J]. Chin. Phys. B, 2012, 21(5): 54212-054212.

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

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

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