Isolated-attosecond-pulse generation from asymmetric molecules with an {omega}+2{omega}/3 multicycle two-color field
Isolated-attosecond-pulse generation from asymmetric molecules with an {omega}+2{omega}/3 multicycle two-color field
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具有 {omega} 2{omega}/3 多周期双色场的不对称分子产生孤立阿秒脉冲
DOI：
10.1103/physreva.81.053846
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发表时间：
2010
影响因子：
2.9
通讯作者：
P. Lu
中科院分区：
文献类型：
--
作者：
Qianguang Li;W. Hong;Qingbin Zhang;Shaoyi Wang;P. Lu
研究了不对称分子在{omega}+2{omega}/3多周期双色激光脉冲中产生的高次谐波。结果表明，由于2{omega}/3控制激光脉冲进一步增强了激光脉冲中心电离峰的幅度，使得非对称分子在连续半个光学周期内的电离不对称性进一步增强。2欧米伽/3控制激光脉冲也显著地增大了中心激光脉冲和下一个半光学周期中被发射电子在半个光学周期中所发射的光子能量之差。此外，在光谱的平台区产生了宽带超连续谱，由此可以直接获得孤立的90As脉冲。
The high harmonic generation from asymmetric molecules with an {omega}+2{omega}/3 multicycle bichromatic laser pulse has been investigated. It is shown that the ionization asymmetry in consecutive half optical cycles for asymmetric molecules is further enhanced since the 2{omega}/3 control laser pulse further enhances the amplitude of the ionization peak at the center of the laser pulse. The 2{omega}/3 control laser pulse also significantly enlarges the difference of the photon energies emitted from the ejected electron in the half optical cycle at the central laser pulse and its next half optical cycle. In addition, a broadband supercontinuum is produced in the plateau of the spectrum, from which an isolated 90-as pulse can be directly obtained.