$S_0 \to S_2/S_1$弱场激发下吡嗪分子$S_2 \leftrightarrow S_1$内转换的相干量子控制
Coherent Quantum Control of $S_2 \leftrightarrow S_1$ Internal Conversion in Pyrazine via $S_0 \to S_2/S_1$ Weak Field Excitation
摘要：
研究了吡嗪中第一（$S_1$）和第二（$S_2$）单重激发电子态之间的内转换（IC）的相干控制，其中$S_2$态是由基态单重电子态$S_0$通过弱场激发填充的.通过对激发$S_2$的激光进行整形来实现控制。使用最近引入的基于谐振的控制方法，同时考虑激励和IC。通过优化激光光谱的振幅和相位分布，实现了非常成功的控制。证明了控制对$S_2$共振性质的依赖性。
英文摘要：
Coherent control of internal conversion (IC) between the first ($S_1$) and second ($S_2$) singlet excited electronic states in pyrazine, where the $S_2$ state is populated from the ground singlet electronic state $S_0$ by weak field excitation, is examined. Control is implemented by shaping the laser which excites $S_2$. Excitation and IC are considered simultaneously, using the recently introduced resonance-based control approach. Highly successful control is achieved by optimizing both the amplitude and phase profiles of the laser spectrum. The dependence of control on the properties of resonances in $S_2$ is demonstrated.
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