双色laser场中H $_2$电子波包的谱线分辨子循环干涉
Channel-resolved subcycle interferences of electron wave packets emitted from H$_2$ in two-color laser fields
摘要：
本文报道了在周期双色激光场作用下，H $_2$强场电离过程中释放的电子波包的子周期干涉现象。利用反应显微镜，获得了H $_2$单电离不同最终产物的通道分辨光电子动量分布。结果表明，电子波包的子周期干涉结构对双色激光场的周期形状非常敏感。这是因为光周期内的电离时间是由激光场的周期形状决定的。这种子循环干涉结构可以进一步用于研究强场相互作用下分子的子循环动力学。
英文摘要：
We report on the observation of subcycle interferences of electron wave packets released during the strong field ionization of H$_2$ with cycle-shaped two-color laser fields. With a reaction microscope, channel-resolved photoelectron momentum distribution are obtained for different final products originating from single ionization of H$_2$. Our results show that the subcycle interference structures of electron wave packet are very sensitive to the cycle-shape of the two-color laser field. The reason is that the ionization time within an optical cycle is determined by the cycle-shape of the laser field. The subcycle interference structures can be further used to get the subcycle dynamics of molecules during strong field interaction.
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