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Chin. Phys. B, 2010, Vol. 19(8): 083203    DOI: 10.1088/1674-1056/19/8/083203
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Attosecond manipulation of ionization and efficient broadband supercontinuum generation in stretched molecules

Wang Shao-Yi(王少义)a), Hong Wei-Yi(洪伟毅)a), Zhang Qing-Bin(张庆斌)a), Li Qian-Guang(李钱光)b), and Lu Pei-Xiang(陆培祥)a)†
a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China; b School of Physics and Electronic-Information Engineering, Xiaogan College, Xiaogan 432000, China
Abstract  We theoretically investigate the high-order harmonic generation from stretched molecules in a linearly polarized intense field. By adopting an infrared pulse combined with an ultraviolet (UV) attosecond pulse, the ionization process can be controlled effectively. In this excitation scheme, the harmonic spectrum beyond Ip + 3.17Up is significantly enhanced by two orders, where Ip and Up = e2E02 /(4meω2) are the ionization and ponderomotive potential, then smooth broadband supercontinuum with the bandwidth of about 120 eV is obtained, which leads to an isolated sub-60-as attosecond pulse with a high signal-noise ratio. Moreover, the bandwidth of the supercontinuum is weakly dependent on the location and pulse duration of the UV pulse.
Keywords:  attosecond manipulation      attosecond pulse      supercontinuum generation  
Received:  01 June 2009      Revised:  31 December 2009      Accepted manuscript online: 
PACS:  33.80.Eh (Autoionization, photoionization, and photodetachment)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10774054), and the National Key Basic Research Special Foundation of China (NKBRSFC) (Grant No. 2006CB806006).

Cite this article: 

Wang Shao-Yi(王少义), Hong Wei-Yi(洪伟毅), Zhang Qing-Bin(张庆斌), Li Qian-Guang(李钱光), and Lu Pei-Xiang(陆培祥) Attosecond manipulation of ionization and efficient broadband supercontinuum generation in stretched molecules 2010 Chin. Phys. B 19 083203

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