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Effects of pressure and gas-jet thickness on the generation of attosecond pulse |
Li Xiao-Yong (李小勇)a b, Wang Guo-Li (王国利)a, Zhou Xiao-Xin (周效信)a |
a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
b Experimental Center, Northwest University for Nationalities, Lanzhou 730030, China |
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Abstract We investigate how the intensity and duration of an attosecond pulse generated from high-order harmonic generation are affected by the pressure and thickness of the gas jet by taking into account the macroscopic propagation of both fundamental and harmonic fields. Our simulations show that, limited by the propagation effects, especially the absorption of harmonics, the intensity of an attosecond pulse cannot be improved by just independently increasing the gas pressure or the medium length. On the other hand, due to good phase-matching conditions, the duration of a generated attosecond pulse can be improved by changing the gas pressure.
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Received: 03 June 2013
Revised: 16 August 2013
Accepted manuscript online:
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PACS:
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31.70.Hq
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(Time-dependent phenomena: excitation and relaxation processes, and reaction rates)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11264036 and 11064013). |
Corresponding Authors:
Zhou Xiao-Xin
E-mail: zhouxx@nwnu.edu.cn
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Cite this article:
Li Xiao-Yong (李小勇), Wang Guo-Li (王国利), Zhou Xiao-Xin (周效信) Effects of pressure and gas-jet thickness on the generation of attosecond pulse 2014 Chin. Phys. B 23 013102
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