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

doi:10.1088/1674-1056/19/8/083203

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 I_p + 3.17U_p is significantly enhanced by two orders, where I_p and U_p = e²E_0² /(4m_eω²) 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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Attosecond manipulation of ionization and efficient broadband supercontinuum generation in stretched molecules

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