Chiral discrimination, a problem of vital importance, has recently become an emerging frontier in ultrafast physics, with remarkable progress achieved in multiphoton and strong-field regimes. Rydberg excitations, unavoidable in the strong-field regime and intentional for few-photon processes, arise in all these approaches. Here, we show how to harness this ubiquitous feature by introducing a new phenomenon, enantiosensitive free-induction decay, steered by a tricolor chiral field at a gentle intensity, structured in space and time. We demonstrate theoretically that an excited chiral molecule accumulates an enantiosensitive phase due to perturbative interactions with the tricolor chiral field, resulting in a spatial phase gradient steering the free-induction decay in opposite directions for opposite enantiomers. Our work introduces a general, extremely sensitive, all-optical enantiosensitive detection technique that avoids strong fields and takes full advantage of recent advances in structuring light.

中文翻译：

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自由感应衰变的对映敏感转向

手性歧视是一个至关重要的问题，最近已成为超快物理学的新兴前沿，在多光子和强场领域取得了显着进展。在所有这些方法中都出现了里德堡激发，它在强场状态下是不可避免的，并且有意用于少光子过程。在这里，我们展示了如何通过引入一种新现象来利用这种普遍存在的特征，即对映体敏感的自由感应衰变，由三色手性场以温和的强度控制，在空间和时间上进行结构化。我们从理论上证明，由于与三色手性场的扰动相互作用，激发的手性分子会积累对映敏感相，从而导致空间相梯度引导相反对映异构体沿相反方向的自由感应衰减。我们的工作介绍了一个一般的，