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

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 harmo...

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Bibliographic Details
Published inChinese physics B Vol. 19; no. 8; pp. 318 - 324
Main Author 王少义 洪伟毅 张庆斌 李钱光 陆培祥
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2010
Subjects
Attosecond pulses
Bandwidth
Broadband
Harmonic generations
Infrared
Ionization
IP (Internet Protocol)
Pulse duration
分子
拉伸
操纵
电离过程
脉冲持续时间
超宽带
阿秒脉冲
高次谐波
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/19/8/083203

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Summary: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 = e^2E0^2/（4mew^2） 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.
Bibliography:attosecond manipulation, attosecond pulse, supercontinuum generation
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/8/083203