氢分子离子的两个核对谐波贡献的研究

通过求解含时薛定谔方程的方法研究H2+的两个核分别对高次谐波产生的贡献. 结果表明，在激光场的作用下两个核周围的电子分布不同从而导致了在不同时刻两个核对谐波产生的贡献不同，即在半整数个光周期谐波的产生主要由核1贡献而在整数个光周期主要由核2贡献. 然后结合时频分布图和电子和核波包密度图，对其物理机制进行了合理解释.

The contributions of the two nuclei to the harmonic generation in H2+ molecules

The separate contributions of the two nuclei in the hydrogen molecular ion to the harmonic generation are investigated by numerically solving the time-dependent Schrödinger equation. The results show that the diverse electron distributions around the two nuclei under the effect of laser field lead to the different contributions of the two nuclei to the harmonic generation in different times, i.e., the contribution mainly comes from nucleus 1 around half-integer optical cycle while from nucleus 2 around integer optical cycle. Then, by means of the time-frequency distributions and the coupled electron nuclear wave-packet density distributions, the physical mechanism is discussed in detail.