论文标题
使用双重田间从二科运动中解散对映异构性
Disentangling enantiosensitivity from dichroism using bichromatic fields
论文作者
论文摘要
我们讨论了如何在各向同性手性样品与跨偏光$ω$-2Ω$双分裂场相互作用引起的光电子角度分布中可用的张力可观察物，允许没有手雷光的手性歧视，并且在电动二杆近似中。我们扩展了手性设置的概念[Phys。 Rev. A 98，063428（2018）]，解释了在缺乏手性光的情况下如何实现手性歧视的情况。我们得出了$ b_ {l，m} $系数的对映激素和二分法的选择规则，这些系数描述了对弱和强场以及任意$ω$ - $2Ω$相对阶段有效的光电角分布。给出了简单扰动案例的明确表达式。我们发现，除了二分色的非抗敏感性[J。化学物理。 151 074106（2019）]，以及最近发现的[物理学。 Rev. A 99，063406（2019）]，也有对映射的非甲状腺$ b_ {l，m} $系数。这些揭示了分子对映异构体独立于两种颜色之间的相对相，因此即使在没有$ω$-2Ω$相对相位的稳定下也可以观察到。
We discuss how tensorial observables, available in photoelectron angular distributions resulting from interaction between isotropic chiral samples and cross polarized $ω$-$2ω$ bichromatic fields, allow for chiral discrimination without chiral light and within the electric-dipole approximation. We extend the concept of chiral setup [Phys. Rev. A 98, 063428 (2018)], which explains how chiral discrimination can be achieved in the absence of chiral light, to the case of tensorial observables. We derive selection rules for the enantiosensitivity and dichroism of the $b_{l,m}$ coefficients describing the photoelectron angular distribution valid for both weak and strong fields and for arbitrary $ω$-$2ω$ relative phase. Explicit expressions for simple perturbative cases are given. We find that, besides the dichroic non-enantiosensitive [J. Chem. Phys. 151 074106 (2019)], and dichroic-and-enantiosensitive $b_{l,m}$ coefficients found recently [Phys. Rev. A 99, 063406 (2019)], there are also enantiosensitive non-dichroic $b_{l,m}$ coefficients. These reveal the molecular enantiomer independently of the relative phase between the two colors and are therefore observable even in the absence of stabilization of the $ω$-$2ω$ relative phase.
