Isolated attosecond pulse generation from atom radiated by a three-color laser pulse

被引：8

作者：

Qin Yue-Fei ^{[1
]}

Guo Fu-Ming ^{[2
]}

Li Su-Yu ^{[2
]}

Yang Yu-Jun ^{[2
]}

Chen Gao ^{[1
]}

机构：

[1] Changchun Univ Sci & Technol, Sch Sci, Changchun 130022, Peoples R China

[2] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 09期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

three-color laser field; high-order harmonic; isolated attosecond pulse; FIELD;

D O I：

10.1088/1674-1056/23/9/093205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically investigate high-order harmonic and attosecond pulse generation from helium atom in a three-color laser field, which is synthesized by 10 fs/800 nm Ti-sapphire laser and a two-color field consisting of 30 fs/532 nm and 30 fs/1330 nm pulses. Compared with harmonic spectrum generated by a monochromatic field, the harmonics generated from the synthesized three-color field show a supercontinuum spectrum with a bandwidth of 235 eV, ranging from the 154th to the 306th order harmonic. This phenomenon can be attributed to the fact that the ionization of atoms as well as motion of ionized electron can be effectively controlled in the three-color field. Therefore, an isolated 46-as pulse can be generated by superposing supercontinuum from the 160th to the 210th order harmonics.

引用

页数：5

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