Shaping of few-cycle laser pulses via a subwavelength structure  

作　　者：郭亮 谢小涛 詹志明 

机构地区：[1]Department of Physics,Northwest University [2]School of Physics and Information Engineering,Jianghan University

出　　处：《Chinese Physics B》2013年第9期450-455,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 61008016 and 61108006);the Natural Science Basis Research Plan in Shaanxi Province of China (Grant No. 2010JQ1002);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20106101120020);the Natural Science Foundation of Hubei Province, China (Grant No. 2011CDC155)

摘　　要：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.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.

关 键 词：ultrashort pulses coherent propagation self-induced transparency 

分 类 号：TN24[电子电信—物理电子学]