Characteristics of high-order harmonics generated from atoms and aligned molecules
Characteristics of high-order harmonics generated from atoms and aligned molecules
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原子和排列分子产生的高次谐波的特性
DOI：
10.1103/physreva.85.051801
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发表时间：
2012
影响因子：
2.9
通讯作者：
and Hirofumi Sakai
中科院分区：
文献类型：
--
作者：
Yosuke Sakemi;Kosaku Kato;Shinichirou Minemoto;and Hirofumi Sakai
利用载波包络稳相脉冲，自参考技术被应用于测量原子和取向分子中产生的高次谐波的相对相位。从频域到时域的傅里叶变换分析表明，驱动脉冲的有效持续时间随着谐波阶数的增加而减小，在此期间有效地产生特定阶次的谐波。在取向分子的情况下，来自N的两个相邻的奇次谐波之间的干涉条纹比来自CO的更明显，这可以通过与N和CO之间的最高占据分子轨道的对称性相关的复杂性的差异来解释。
With carrier-envelope-phase-stabilized pulses, the self-referencing technique is applied to evaluate the relative phase of high-order harmonics generated in atoms and aligned molecules. The Fourier transform analysis from the frequency domain to the time domain shows that theeffectiveduration of the driving pulse, during which the specific orders of harmonics are efficiently generated, is decreased as the harmonic order is increased. In the case of aligned molecules, the interference fringes between the two adjacent odd-order harmonics from Nare more distinctive than those from CO, which may be explained by the difference in the complexity associated with the symmetry of highest occupied molecular orbitals between Nand CO.