Controlling HD+ and H+2 dissociation with the carrier-envelope phase difference of an intense ultrashort laser pulse.
Controlling HD+ and H+2 dissociation with the carrier-envelope phase difference of an intense ultrashort laser pulse.
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DOI：
10.1103/physrevlett.93.163601
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发表时间：
2004-10
影响因子：
8.6
通讯作者：
V. Roudnev;B. Esry;I. Ben-Itzhak
中科院分区：
文献类型：
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作者：
V. Roudnev;B. Esry;I. Ben-Itzhak
在含时薛定谔方程的框架下，研究了HD+分子离子在强、线偏振、超短激光脉冲场中解离时的载流子包络相位差效应。我们考虑了一个降维模型，在该模型中，原子核可以沿场极化自由振动，电子在二维中运动。该激光器的中心波长为790 nm，脉宽为10fs，激光强度范围为6×10(14)~9×10(14)W/cm(2)。我们发现，p+D和H+d的解离角分布可以通过改变位相差来控制，从而产生大于2倍的解离通道之间的差异。此外，H+2解离的不对称性几乎同样大。
Carrier-envelope phase difference effects in the dissociation of the HD+ molecular ion in the field of an intense, linearly polarized, ultrashort laser pulse are studied in the framework of the time-dependent Schrödinger equation. We consider a reduced-dimensionality model in which the nuclei are free to vibrate along the field polarization and the electrons move in two dimensions. The laser has a central wavelength of 790 nm and a pulse length of 10 fs with intensities in the range 6x10(14) to 9x10(14) W/cm(2). We find that the angular distribution of dissociation to p+D and H+d can be controlled by varying the phase difference, generating differences between the dissociation channels of more than a factor of 2. Moreover, the asymmetry is nearly as large for H+2 dissociation.