Observing molecular structures by using high-order harmonic generation in mixed gases
Observing molecular structures by using high-order harmonic generation in mixed gases
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DOI：
10.1103/physreva.77.041402
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发表时间：
2008-04
影响因子：
2.9
通讯作者：
T. Kanai;E. Takahashi;Y. Nabekawa;K. Midorikawa
中科院分区：
文献类型：
--
作者：
T. Kanai;E. Takahashi;Y. Nabekawa;K. Midorikawa
我们证明了分子的结构可以通过测量谐波的相位来确定。这是通过观察在alignedmolecules和它们的参考Kr原子的混合气体中产生的谐波的相位跳变来证明的，该相位跳变用于提取由于分子的结构而产生的净贡献。在强场近似模型下，我们进一步解析地导出了分子中高次谐波产生的量子干涉条件，并提出了一种控制谐波脉冲宽度的方法。
We demonstrate that the structure ofmolecules can be determined by measuring the phases of harmonics from them. This is evidenced by observing a phase jump of harmonics generated in a mixed gas of alignedmolecules and their reference Kr atoms, which serve to extract the net contribution due to the structure ofmolecules. Furthermore, in the strong field approximation model, we derive the exact conditions of quantum interference during high-order harmonic generation inmolecules analytically and we propose a method to control harmonic pulse duration.