Shaping of few-cycle laser pulses via a subwavelength structure |
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Authors: | Guo Liang Xie Xiao-Tao and Zhan Zhi-Ming |
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Institution: | [1]Department of Physics, Northwest University, Xi'an 710069, China [2]School of Physics and Information Engineering, Jianghan University, Wuhan 430056, China |
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Abstract: | We theoretically investigate the propagation of few-cycle laser pulses in resonant two-level dense media with a sub-wavelength structure, which is described by the full Maxwell-Bloch equations without the frame of slowly varying envelope and rotating wave approximations. The input pulses can be shaped into shorter ones with a single or less than one optical cycle. The effect of the parameters of the subwavelength structure and laser pulses is studied. Our study shows that the media with a subwavelength structure can significantly shape the few-cycle pulses into a subcycle pulse, even for the case of chirp pulses as input fields. This suggests that such subwavelength structures have potential application in the shaping of few-cycle laser pulses. |
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Keywords: | ultrashort pulses coherent propagation self-induced transparency |
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